Vulnerability-Lookup

RHSA-2026:74025

Vulnerability from csaf_redhat - Published: 2026-09-30 15:04 - Updated: 2026-10-01 01:09

Summary

Red Hat Security Advisory: OpenShift File Integrity Operator bug fix and enhancement update

Severity

Important

Notes

Topic: An updated OpenShift File Integrity Operator image that fixes various bugs and adds new enhancements is now available for the Red Hat OpenShift Enterprise 4 catalog.

Details: The OpenShift File Integrity Operator v1.5.0 is now available. See the documentation for bug fix information: https://docs.redhat.com/en/documentation/openshift_container_platform/latest/html/security_and_compliance/file-integrity-operator

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2026-56853

A flaw was found in the `net/http` component of the Go standard library. When a server is configured to support unencrypted HTTP/2, it reads initial bytes from new connections to detect the HTTP/2 client preface. However, the `ReadHeaderTimeout` is not correctly applied during this process. This oversight could allow a remote attacker to maintain open connections indefinitely, potentially leading to a Denial of Service (DoS) by exhausting server resources.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-770 - Allocation of Resources Without Limits or Throttling

Affected products

Fixed 3 products

Product	Version	Remediation
Unresolved product id: OpenShift File Integrity Operator - FIO 1:registry.redhat.io/compliance/openshift-file-integrity-rhel8-operator@sha256:0c7dc211b2a8c47feba627e330a7dfb446110d31fc660cb95a68845469c12918_amd64	—	Vendor Fix fix
Unresolved product id: OpenShift File Integrity Operator - FIO 1:registry.redhat.io/compliance/openshift-file-integrity-rhel8-operator@sha256:2fe717888d8e7cedfdecb8b0c6c9a52a114d5c886295259f8b1cb7da96cfe28a_s390x	—	Vendor Fix fix
Unresolved product id: OpenShift File Integrity Operator - FIO 1:registry.redhat.io/compliance/openshift-file-integrity-rhel8-operator@sha256:78c550a290beb65d30bc966c167b1d1a55d8768b71d02c097b2737a444ef5b7f_ppc64le	—	Vendor Fix fix

Known not affected 1 product

Product	Identifier	Version	Remediation
Unresolved product id: OpenShift File Integrity Operator - FIO 1:registry.redhat.io/compliance/openshift-file-integrity-operator-bundle@sha256:bafc11174a80529da7f954f1636d3b3f83e4de63c445210293b20eee04527a3b_amd64		—

Threats

Impact Important

CVE-2026-56858

A flaw was found in the `html/template` component of Go (golang). Pathological inputs could prematurely close an unescaped forward slash ('/'), allowing an attacker to inject arbitrary content. This could lead to Cross-Site Scripting (XSS), where malicious scripts are executed in a user's browser, potentially compromising user data or actions.

8.1 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected products

Fixed 3 products, the same list as for CVE-2026-56853

Known not affected 1 product, the same list as for CVE-2026-56853

Threats

Impact Important

CVE-2026-56859

A flaw was found in the `encoding/xml` package of Go. The `DecodeElement` function failed to correctly track recursion depth, which could lead to stack exhaustion. A remote attacker could exploit this vulnerability by providing a specially crafted XML input, resulting in a Denial of Service (DoS) for the affected application.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-776 - Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

Affected products

Fixed 3 products, the same list as for CVE-2026-56853

Known not affected 1 product, the same list as for CVE-2026-56853

Threats

Impact Important

CVE-2026-56860

A flaw was found in `net/url`, a component of `golang`. This vulnerability arises when resolving relative paths that contain numerous parent directory ('..') segments. A remote attacker could exploit this by providing a specially crafted path, leading to quadratic time complexity and excessive memory allocation. This can result in a Denial of Service (DoS) due to resource exhaustion.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-770 - Allocation of Resources Without Limits or Throttling

Affected products

Fixed 3 products, the same list as for CVE-2026-56853

Known not affected 1 product, the same list as for CVE-2026-56853

Threats

Impact Important

CVE-2026-56862

A flaw was found in the `crypto/tls` package, part of `golang`. A malicious client can exploit this vulnerability by continuously sending KeyUpdate messages to a server. This forces the server to perform indefinite key derivation operations, leading to resource exhaustion and a Denial of Service (DoS) condition.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-1050 - Excessive Platform Resource Consumption within a Loop

Affected products

Fixed 3 products, the same list as for CVE-2026-56853

Known not affected 1 product, the same list as for CVE-2026-56853

Threats

Impact Important

References

44 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:74025	self
https://access.redhat.com/security/cve/CVE-2026-56853	external
https://access.redhat.com/security/cve/CVE-2026-56858	external
https://access.redhat.com/security/cve/CVE-2026-56859	external
https://access.redhat.com/security/cve/CVE-2026-56860	external
https://access.redhat.com/security/cve/CVE-2026-56862	external
https://access.redhat.com/security/updates/classi…	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-56853	self
https://bugzilla.redhat.com/show_bug.cgi?id=2515827	external
https://www.cve.org/CVERecord?id=CVE-2026-56853	external
https://nvd.nist.gov/vuln/detail/CVE-2026-56853	external
https://go.dev/cl/795540	external
https://go.dev/issue/80205	external
https://groups.google.com/g/golang-announce/c/94p…	external
https://pkg.go.dev/vuln/GO-2026-6089	external
https://access.redhat.com/security/cve/CVE-2026-56858	self
https://bugzilla.redhat.com/show_bug.cgi?id=2515838	external
https://www.cve.org/CVERecord?id=CVE-2026-56858	external
https://nvd.nist.gov/vuln/detail/CVE-2026-56858	external
https://go.dev/cl/807100	external
https://go.dev/issue/80435	external
https://pkg.go.dev/vuln/GO-2026-6091	external
https://access.redhat.com/security/cve/CVE-2026-56859	self
https://bugzilla.redhat.com/show_bug.cgi?id=2515840	external
https://www.cve.org/CVERecord?id=CVE-2026-56859	external
https://nvd.nist.gov/vuln/detail/CVE-2026-56859	external
https://go.dev/cl/803320	external
https://go.dev/issue/80481	external
https://pkg.go.dev/vuln/GO-2026-6088	external
https://access.redhat.com/security/cve/CVE-2026-56860	self
https://bugzilla.redhat.com/show_bug.cgi?id=2515820	external
https://www.cve.org/CVERecord?id=CVE-2026-56860	external
https://nvd.nist.gov/vuln/detail/CVE-2026-56860	external
https://go.dev/cl/803681	external
https://go.dev/issue/80494	external
https://pkg.go.dev/vuln/GO-2026-6218	external
https://access.redhat.com/security/cve/CVE-2026-56862	self
https://bugzilla.redhat.com/show_bug.cgi?id=2515839	external
https://www.cve.org/CVERecord?id=CVE-2026-56862	external
https://nvd.nist.gov/vuln/detail/CVE-2026-56862	external
https://go.dev/cl/804261	external
https://go.dev/issue/80528	external
https://pkg.go.dev/vuln/GO-2026-6090	external

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        {
          "category": "description",
          "text": "A flaw was found in the `net/http` component of the Go standard library. When a server is configured to support unencrypted HTTP/2, it reads initial bytes from new connections to detect the HTTP/2 client preface. However, the `ReadHeaderTimeout` is not correctly applied during this process. This oversight could allow a remote attacker to maintain open connections indefinitely, potentially leading to a Denial of Service (DoS) by exhausting server resources.",
          "title": "Vulnerability description"
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        {
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          "title": "Statement"
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          "text": "A flaw was found in the `encoding/xml` package of Go. The `DecodeElement` function failed to correctly track recursion depth, which could lead to stack exhaustion. A remote attacker could exploit this vulnerability by providing a specially crafted XML input, resulting in a Denial of Service (DoS) for the affected application.",
          "title": "Vulnerability description"
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          "title": "Statement"
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        {
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        {
          "category": "summary",
          "text": "net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important denial of service flaw in the Go `net/url` package. Applications built with Go that process untrusted URLs containing parent directory segments (\u0027..\u0027) may be vulnerable to excessive resource consumption due to quadratic time complexity in path resolution. This can lead to a denial of service, impacting the availability of affected services.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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          "OpenShift File Integrity Operator - FIO 1:registry.redhat.io/compliance/openshift-file-integrity-rhel8-operator@sha256:2fe717888d8e7cedfdecb8b0c6c9a52a114d5c886295259f8b1cb7da96cfe28a_s390x",
          "OpenShift File Integrity Operator - FIO 1:registry.redhat.io/compliance/openshift-file-integrity-rhel8-operator@sha256:78c550a290beb65d30bc966c167b1d1a55d8768b71d02c097b2737a444ef5b7f_ppc64le"
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      "references": [
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          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-56860"
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        {
          "category": "external",
          "summary": "RHBZ#2515820",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2515820"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-56860",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-56860"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-56860",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56860"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/803681",
          "url": "https://go.dev/cl/803681"
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        {
          "category": "external",
          "summary": "https://go.dev/issue/80494",
          "url": "https://go.dev/issue/80494"
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        {
          "category": "external",
          "summary": "https://groups.google.com/g/golang-announce/c/94pEornpRlI",
          "url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
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        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-6218",
          "url": "https://pkg.go.dev/vuln/GO-2026-6218"
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          "category": "vendor_fix",
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          "details": "Before applying this update, make sure all previously released errata relevant to your\nsystem have been applied. For details on how to apply this update, refer to:\n\nhttps://docs.openshift.com/container-platform/latest/updating/updating_a_cluster/updating-cluster-cli.html",
          "product_ids": [
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            "OpenShift File Integrity Operator - FIO 1:registry.redhat.io/compliance/openshift-file-integrity-rhel8-operator@sha256:2fe717888d8e7cedfdecb8b0c6c9a52a114d5c886295259f8b1cb7da96cfe28a_s390x",
            "OpenShift File Integrity Operator - FIO 1:registry.redhat.io/compliance/openshift-file-integrity-rhel8-operator@sha256:78c550a290beb65d30bc966c167b1d1a55d8768b71d02c097b2737a444ef5b7f_ppc64le"
          ],
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            "category": "none"
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          "url": "https://access.redhat.com/errata/RHSA-2026:74025"
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          "cvss_v3": {
            "attackComplexity": "LOW",
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            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
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            "OpenShift File Integrity Operator - FIO 1:registry.redhat.io/compliance/openshift-file-integrity-rhel8-operator@sha256:0c7dc211b2a8c47feba627e330a7dfb446110d31fc660cb95a68845469c12918_amd64",
            "OpenShift File Integrity Operator - FIO 1:registry.redhat.io/compliance/openshift-file-integrity-rhel8-operator@sha256:2fe717888d8e7cedfdecb8b0c6c9a52a114d5c886295259f8b1cb7da96cfe28a_s390x",
            "OpenShift File Integrity Operator - FIO 1:registry.redhat.io/compliance/openshift-file-integrity-rhel8-operator@sha256:78c550a290beb65d30bc966c167b1d1a55d8768b71d02c097b2737a444ef5b7f_ppc64le"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
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      ],
      "title": "net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution"
    },
    {
      "cve": "CVE-2026-56862",
      "cwe": {
        "id": "CWE-1050",
        "name": "Excessive Platform Resource Consumption within a Loop"
      },
      "discovery_date": "2026-08-13T22:16:41.928450+00:00",
      "flags": [
        {
          "label": "vulnerable_code_not_present",
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        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2515839"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the `crypto/tls` package, part of `golang`. A malicious client can exploit this vulnerability by continuously sending KeyUpdate messages to a server. This forces the server to perform indefinite key derivation operations, leading to resource exhaustion and a Denial of Service (DoS) condition.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important denial of service vulnerability in the `golang` `crypto/tls` package. A remote, unauthenticated attacker can exploit this flaw by continuously sending `KeyUpdate` messages during a TLS handshake, forcing the server to perform indefinite key derivation operations. This resource exhaustion can lead to a denial of service for applications and services in Red Hat products that use the affected `crypto/tls` library and are exposed to untrusted network clients.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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          "url": "https://www.cve.org/CVERecord?id=CVE-2026-56862"
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          "category": "external",
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        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/804261",
          "url": "https://go.dev/cl/804261"
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          "category": "external",
          "summary": "https://go.dev/issue/80528",
          "url": "https://go.dev/issue/80528"
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        {
          "category": "external",
          "summary": "https://groups.google.com/g/golang-announce/c/94pEornpRlI",
          "url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-6090",
          "url": "https://pkg.go.dev/vuln/GO-2026-6090"
        }
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      "release_date": "2026-08-13T21:58:53.216000+00:00",
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          "category": "vendor_fix",
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          "details": "Before applying this update, make sure all previously released errata relevant to your\nsystem have been applied. For details on how to apply this update, refer to:\n\nhttps://docs.openshift.com/container-platform/latest/updating/updating_a_cluster/updating-cluster-cli.html",
          "product_ids": [
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            "OpenShift File Integrity Operator - FIO 1:registry.redhat.io/compliance/openshift-file-integrity-rhel8-operator@sha256:78c550a290beb65d30bc966c167b1d1a55d8768b71d02c097b2737a444ef5b7f_ppc64le"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:74025"
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      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
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            "OpenShift File Integrity Operator - FIO 1:registry.redhat.io/compliance/openshift-file-integrity-rhel8-operator@sha256:0c7dc211b2a8c47feba627e330a7dfb446110d31fc660cb95a68845469c12918_amd64",
            "OpenShift File Integrity Operator - FIO 1:registry.redhat.io/compliance/openshift-file-integrity-rhel8-operator@sha256:2fe717888d8e7cedfdecb8b0c6c9a52a114d5c886295259f8b1cb7da96cfe28a_s390x",
            "OpenShift File Integrity Operator - FIO 1:registry.redhat.io/compliance/openshift-file-integrity-rhel8-operator@sha256:78c550a290beb65d30bc966c167b1d1a55d8768b71d02c097b2737a444ef5b7f_ppc64le"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
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      ],
      "title": "crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages"
    }
  ]
}

CVE-2026-56853 (GCVE-0-2026-56853)

Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-08-14 15:23

Title

Apply ReadHeaderTimeout when doing unencrypted HTTP/2 check in net/http

Summary

When a server is configured to support unencrypted HTTP/2, it reads a few bytes from each new connection to see if they contain the HTTP/2 client preface. ReadHeaderTimeout is unexpectedly not being applied when doing this.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-14 15:22 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

Go Google root Scorecard

References

4 references

URL	Tags
https://go.dev/issue/80205
https://go.dev/cl/795540
https://groups.google.com/g/golang-announce/c/94p…
https://pkg.go.dev/vuln/GO-2026-6089

Impacted products

1 product

Vendor	Product	Version
Go standard library	net/http	Affected: 0 , < 1.25.13 (semver) Affected: 1.26.0-0 , < 1.26.6 (semver) Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "confidentialityImpact": "NONE",
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              "scope": "UNCHANGED",
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          "shortName": "CISA-ADP"
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        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
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              "name": "ListenAndServe"
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              "name": "ListenAndServeTLS"
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              "lessThan": "1.25.13",
              "status": "affected",
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        }
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      "providerMetadata": {
        "dateUpdated": "2026-08-13T21:58:53.092Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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          "url": "https://pkg.go.dev/vuln/GO-2026-6089"
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      "title": "Apply ReadHeaderTimeout when doing unencrypted HTTP/2 check in net/http"
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  "cveMetadata": {
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    "datePublished": "2026-08-13T21:58:53.092Z",
    "dateReserved": "2026-06-23T15:10:49.352Z",
    "dateUpdated": "2026-08-14T15:23:18.680Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-56858 (GCVE-0-2026-56858)

Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-08-14 15:32

Title

Fix Javascript regexp context tracking in html/template

Summary

Previously, pathological inputs could close an unescaped '/' early, allowing for attack-controlled data to inject arbitrary content, potentially leading to XSS.

Severity

6.1 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-14 15:31 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

Go Google root Scorecard

References

4 references

URL	Tags
https://go.dev/issue/80435
https://go.dev/cl/807100
https://groups.google.com/g/golang-announce/c/94p…
https://pkg.go.dev/vuln/GO-2026-6091

Impacted products

1 product

Vendor	Product	Version
Go standard library	html/template	Affected: 0 , < 1.25.13 (semver) Affected: 1.26.0-0 , < 1.26.6 (semver) Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver)

Credits

Ali Sherif

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
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            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              }
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        "providerMetadata": {
          "dateUpdated": "2026-08-14T15:32:29.852Z",
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          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "html/template",
          "product": "html/template",
          "programRoutines": [
            {
              "name": "tJS"
            },
            {
              "name": "Template.Execute"
            },
            {
              "name": "Template.ExecuteTemplate"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.25.13",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.26.6",
              "status": "affected",
              "version": "1.26.0-0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.27.0-rc.3",
              "status": "affected",
              "version": "1.27.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Ali Sherif"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Previously, pathological inputs could close an unescaped \u0027/\u0027 early, allowing for attack-controlled data to inject arbitrary content, potentially leading to XSS."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-13T21:58:53.354Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/80435"
        },
        {
          "url": "https://go.dev/cl/807100"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6091"
        }
      ],
      "title": "Fix Javascript regexp context tracking in html/template"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-56858",
    "datePublished": "2026-08-13T21:58:53.354Z",
    "dateReserved": "2026-06-23T15:10:49.353Z",
    "dateUpdated": "2026-08-14T15:32:29.852Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-56859 (GCVE-0-2026-56859)

Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-08-14 15:21

Title

Add recursion depth guard during decode in encoding/xml

Summary

Previously, DecodeElement would reset the depth counter causing it to never fire; this could lead to stack exhaustion.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-14 15:21 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

Go Google root Scorecard

References

4 references

URL	Tags
https://go.dev/issue/80481
https://go.dev/cl/803320
https://groups.google.com/g/golang-announce/c/94p…
https://pkg.go.dev/vuln/GO-2026-6088

Impacted products

1 product

Vendor	Product	Version
Go standard library	encoding/xml	Affected: 0 , < 1.25.13 (semver) Affected: 1.26.0-0 , < 1.26.6 (semver) Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-56859",
                "options": [
                  {
                    "Exploitation": "none"
                  },
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                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2026-08-14T15:21:09.615961Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
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            "descriptions": [
              {
                "cweId": "CWE-770",
                "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-14T15:21:46.218Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "encoding/xml",
          "product": "encoding/xml",
          "programRoutines": [
            {
              "name": "Decoder.push"
            },
            {
              "name": "Decoder.pop"
            },
            {
              "name": "Decoder.RawToken"
            },
            {
              "name": "Decoder.unmarshalPath"
            },
            {
              "name": "Decoder.unmarshal"
            },
            {
              "name": "Decoder.Decode"
            },
            {
              "name": "Decoder.DecodeElement"
            },
            {
              "name": "Decoder.Skip"
            },
            {
              "name": "Decoder.Token"
            },
            {
              "name": "Unmarshal"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.25.13",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.26.6",
              "status": "affected",
              "version": "1.26.0-0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.27.0-rc.3",
              "status": "affected",
              "version": "1.27.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Previously, DecodeElement would reset the depth counter causing it to never fire; this could lead to stack exhaustion."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-13T21:58:52.959Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
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        },
        {
          "url": "https://go.dev/cl/803320"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6088"
        }
      ],
      "title": "Add recursion depth guard during decode in encoding/xml"
    }
  },
  "cveMetadata": {
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    "assignerShortName": "Go",
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    "datePublished": "2026-08-13T21:58:52.959Z",
    "dateReserved": "2026-06-23T15:10:49.353Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-56860 (GCVE-0-2026-56860)

Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-08-14 16:14

Title

Avoid quadratic complexity in resolvePath in net/url

Summary

Previously, resolving relative paths containing parent directory ('..') segments performed string conversions and buffer rewrites on each step, resulting in quadratic time complexity and high memory allocation overhead. Now, path resolution operates on a byte buffer using index-based backtracking for '..' segments, eliminating the quadratic time complexity and significantly reducing memory allocations.

Severity

5.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-14 16:14 UTC

CWE

CWE-407 - Inefficient Algorithmic Complexity

Assigner

Go Google root Scorecard

References

4 references

URL	Tags
https://go.dev/cl/803681
https://go.dev/issue/80494
https://groups.google.com/g/golang-announce/c/94p…
https://pkg.go.dev/vuln/GO-2026-6218

Impacted products

1 product

Vendor	Product	Version
Go standard library	net/url	Affected: 0 , < 1.25.13 (semver) Affected: 1.26.0-0 , < 1.26.6 (semver) Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 5.9,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-56860",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
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                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-14T16:14:34.601382Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-407",
                "description": "CWE-407 Inefficient Algorithmic Complexity",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-14T16:14:39.166Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "net/url",
          "product": "net/url",
          "programRoutines": [
            {
              "name": "resolvePath"
            },
            {
              "name": "URL.Parse"
            },
            {
              "name": "URL.ResolveReference"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.25.13",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.26.6",
              "status": "affected",
              "version": "1.26.0-0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.27.0-rc.3",
              "status": "affected",
              "version": "1.27.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Previously, resolving relative paths containing parent directory (\u0027..\u0027) segments performed string conversions and buffer rewrites on each step, resulting in quadratic time complexity and high memory allocation overhead. Now, path resolution operates on a byte buffer using index-based backtracking for \u0027..\u0027 segments, eliminating the quadratic time complexity and significantly reducing memory allocations."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-407: Inefficient Algorithmic Complexity",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-13T21:58:53.731Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/cl/803681"
        },
        {
          "url": "https://go.dev/issue/80494"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6218"
        }
      ],
      "title": "Avoid quadratic complexity in resolvePath in net/url"
    }
  },
  "cveMetadata": {
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    "dateUpdated": "2026-08-14T16:14:39.166Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-56862 (GCVE-0-2026-56862)

Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-08-14 15:29

Title

Limit handshake messages we are willing to accept post-handshake in crypto/tls

Summary

Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate messages to force the server to keep performing key derivation operations indefinitely.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-14 15:27 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

Go Google root Scorecard

References

4 references

URL	Tags
https://go.dev/issue/80528
https://go.dev/cl/804261
https://groups.google.com/g/golang-announce/c/94p…
https://pkg.go.dev/vuln/GO-2026-6090

Impacted products

1 product

Vendor	Product	Version
Go standard library	crypto/tls	Affected: 0 , < 1.25.13 (semver) Affected: 1.26.0-0 , < 1.26.6 (semver) Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver)

Credits

Qi Deng of Aurascape.ai

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-56862",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-14T15:27:34.651997Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
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            "descriptions": [
              {
                "cweId": "CWE-770",
                "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-14T15:29:41.741Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "crypto/tls",
          "product": "crypto/tls",
          "programRoutines": [
            {
              "name": "Conn.readRecordOrCCS"
            },
            {
              "name": "Conn.Handshake"
            },
            {
              "name": "Conn.HandshakeContext"
            },
            {
              "name": "Conn.Read"
            },
            {
              "name": "Conn.Write"
            },
            {
              "name": "Dial"
            },
            {
              "name": "DialWithDialer"
            },
            {
              "name": "Dialer.Dial"
            },
            {
              "name": "Dialer.DialContext"
            },
            {
              "name": "QUICConn.HandleData"
            },
            {
              "name": "QUICConn.Start"
            }
          ],
          "vendor": "Go standard library",
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              "status": "affected",
              "version": "0",
              "versionType": "semver"
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            {
              "lessThan": "1.26.6",
              "status": "affected",
              "version": "1.26.0-0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.27.0-rc.3",
              "status": "affected",
              "version": "1.27.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
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        {
          "lang": "en",
          "value": "Qi Deng of Aurascape.ai"
        }
      ],
      "descriptions": [
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          "lang": "en",
          "value": "Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate messages to force the server to keep performing key derivation operations indefinitely."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
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            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-13T21:58:53.216Z",
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          "url": "https://go.dev/cl/804261"
        },
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          "url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6090"
        }
      ],
      "title": "Limit handshake messages we are willing to accept post-handshake in crypto/tls"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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    "datePublished": "2026-08-13T21:58:53.216Z",
    "dateReserved": "2026-06-23T15:10:49.353Z",
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    "state": "PUBLISHED"
  },
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

RHSA-2026:74025

CVE-2026-56853 (GCVE-0-2026-56853)

CVE-2026-56858 (GCVE-0-2026-56858)

CVE-2026-56859 (GCVE-0-2026-56859)

CVE-2026-56860 (GCVE-0-2026-56860)

CVE-2026-56862 (GCVE-0-2026-56862)

Tags

Sightings

Nomenclature

Related by attack behaviour