Vulnerability-Lookup

RHSA-2026:36862

Vulnerability from csaf_redhat - Published: 2026-07-08 20:16 - Updated: 2026-09-08 00:06

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Severity

Moderate

Notes

Topic: An update for Red Hat Hardened Images RPMs is now available.

Details: This update includes the following RPMs: hugo: * hugo-0.163.3-0.1.hum1 (aarch64, x86_64) * hugo-0.163.3-0.1.hum1.src (src) Security Fix(es): hugo: * CVE-2026-58402 * CVE-2026-58403

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-2026-50133

A flaw was found in Hugo, a static site generator. This vulnerability allows a remote attacker to perform stored cross-site scripting (XSS) by ingesting untrusted HTML content files. When a site processes these malicious files, the embedded script is executed verbatim in the rendered page, potentially leading to unauthorized actions or information disclosure in a user's browser.

6.1 (Medium)


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

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

Affected products

Fixed 3 products

Product	Version	Remediation
Unresolved product id: Red Hat Hardened Images:hugo-main@aarch64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:hugo-main@src	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:hugo-main@x86_64	—	Vendor Fix fix

Threats

Impact Moderate

CVE-2026-58402

A flaw was found in Hugo, a static site generator. The default code-block renderer failed to properly escape Markdown code-fence language or info-strings. This vulnerability allows an attacker to inject malicious script elements into web pages, leading to Cross-site Scripting (XSS). Successful exploitation could result in arbitrary code execution within a user's browser.

5.4 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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-2026-50133

Threats

Impact Moderate

CVE-2026-58403

A flaw was found in Hugo, a static site generator. A regression in its virtual filesystem allowed a symlink (symbolic link) planted within a theme or local mount to bypass security restrictions. This could enable an attacker to read arbitrary files on the system where Hugo is running, leading to information disclosure.

6.5 (Medium)


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

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected products

Fixed 3 products, the same list as for CVE-2026-50133

Threats

Impact Moderate

CVE-2026-58404

A flaw was found in Hugo, a static site generator. The default security policy intended to deny requests to loopback, internal, and cloud-metadata IPv4 addresses could be bypassed. This occurred because the deny rule only matched dotted-decimal notation, allowing alternate IPv4 encodings (integer, hex, or octal) to pass the policy. When a template processes an untrusted URL, this vulnerability could lead to Server-Side Request Forgery (SSRF), enabling access to internal services or cloud-metadata endpoints during the build process.

6.8 (Medium)


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

CWE-918 - Server-Side Request Forgery (SSRF)

Affected products

Fixed 3 products, the same list as for CVE-2026-50133

Threats

Impact Moderate

References

37 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:36862	self
https://access.redhat.com/security/cve/CVE-2026-58402	external
https://access.redhat.com/security/cve/CVE-2026-58403	external
https://access.redhat.com/security/updates/classi…	external
https://images.redhat.com/	external
https://access.redhat.com/security/cve/CVE-2026-50133	external
https://access.redhat.com/security/cve/CVE-2026-58404	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-50133	self
https://bugzilla.redhat.com/show_bug.cgi?id=2497463	external
https://www.cve.org/CVERecord?id=CVE-2026-50133	external
https://nvd.nist.gov/vuln/detail/CVE-2026-50133	external
https://github.com/gohugoio/hugo/commit/e41a06447…	external
https://github.com/gohugoio/hugo/releases/tag/v0.162.0	external
https://github.com/gohugoio/hugo/security/advisor…	external
https://access.redhat.com/security/cve/CVE-2026-58402	self
https://bugzilla.redhat.com/show_bug.cgi?id=2497467	external
https://www.cve.org/CVERecord?id=CVE-2026-58402	external
https://nvd.nist.gov/vuln/detail/CVE-2026-58402	external
https://github.com/gohugoio/hugo/commit/ce1a7e0bc…	external
https://github.com/gohugoio/hugo/pull/15051	external
https://github.com/gohugoio/hugo/releases/tag/v0.163.3	external
https://github.com/gohugoio/hugo/security/advisor…	external
https://access.redhat.com/security/cve/CVE-2026-58403	self
https://bugzilla.redhat.com/show_bug.cgi?id=2497460	external
https://www.cve.org/CVERecord?id=CVE-2026-58403	external
https://nvd.nist.gov/vuln/detail/CVE-2026-58403	external
https://github.com/gohugoio/hugo/commit/cf9c8f93c…	external
https://github.com/gohugoio/hugo/pull/15020	external
https://github.com/gohugoio/hugo/releases/tag/v0.163.1	external
https://github.com/gohugoio/hugo/security/advisor…	external
https://access.redhat.com/security/cve/CVE-2026-58404	self
https://bugzilla.redhat.com/show_bug.cgi?id=2497450	external
https://www.cve.org/CVERecord?id=CVE-2026-58404	external
https://nvd.nist.gov/vuln/detail/CVE-2026-58404	external
https://github.com/gohugoio/hugo/commit/a00b5c72a…	external
https://github.com/gohugoio/hugo/security/advisor…	external

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    },
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      "cve": "CVE-2026-58403",
      "cwe": {
        "id": "CWE-22",
        "name": "Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)"
      },
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      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
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          "title": "Vulnerability description"
        },
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          "category": "summary",
          "text": "github.com/gohugoio/hugo: Hugo: Information disclosure via symlink confinement bypass in virtual filesystem",
          "title": "Vulnerability summary"
        },
        {
          "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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          "Red Hat Hardened Images:hugo-main@src",
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          "summary": "RHBZ#2497460",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2497460"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-58403",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-58403"
        },
        {
          "category": "external",
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-58403"
        },
        {
          "category": "external",
          "summary": "https://github.com/gohugoio/hugo/commit/cf9c8f93ca2a2838ce378f9e36d052ac2f79e229",
          "url": "https://github.com/gohugoio/hugo/commit/cf9c8f93ca2a2838ce378f9e36d052ac2f79e229"
        },
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          "category": "external",
          "summary": "https://github.com/gohugoio/hugo/pull/15020",
          "url": "https://github.com/gohugoio/hugo/pull/15020"
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          "category": "external",
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        },
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          "category": "external",
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          "url": "https://github.com/gohugoio/hugo/security/advisories/GHSA-c3wq-j5vh-68rc"
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      ],
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        {
          "category": "vendor_fix",
          "date": "2026-07-08T20:16:29+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
          "product_ids": [
            "Red Hat Hardened Images:hugo-main@aarch64",
            "Red Hat Hardened Images:hugo-main@src",
            "Red Hat Hardened Images:hugo-main@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:36862"
        }
      ],
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        {
          "cvss_v3": {
            "attackComplexity": "LOW",
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
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          "category": "impact",
          "details": "Moderate"
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      "title": "github.com/gohugoio/hugo: Hugo: Information disclosure via symlink confinement bypass in virtual filesystem"
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      "cve": "CVE-2026-58404",
      "cwe": {
        "id": "CWE-918",
        "name": "Server-Side Request Forgery (SSRF)"
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      "discovery_date": "2026-07-06T20:01:18.820943+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
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          "category": "description",
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          "category": "external",
          "summary": "https://github.com/gohugoio/hugo/releases/tag/v0.163.1",
          "url": "https://github.com/gohugoio/hugo/releases/tag/v0.163.1"
        },
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          "category": "external",
          "summary": "https://github.com/gohugoio/hugo/security/advisories/GHSA-r46f-3rpw-hxrv",
          "url": "https://github.com/gohugoio/hugo/security/advisories/GHSA-r46f-3rpw-hxrv"
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      ],
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        {
          "category": "vendor_fix",
          "date": "2026-07-08T20:16:29+00:00",
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          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:36862"
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      ],
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        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
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            "integrityImpact": "NONE",
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      ],
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        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "github.com/gohugoio/hugo: Hugo: Server-Side Request Forgery (SSRF) via alternate IPv4 encodings"
    }
  ]
}

CVE-2026-50133 (GCVE-0-2026-50133)

Vulnerability from cvelistv5 – Published: 2026-07-06 19:31 – Updated: 2026-07-07 14:44

Title

Hugo: XSS via text/html content files

Summary

Hugo is a static site generator. Prior to 0.162.0, Hugo accepts content files in several markup formats. Files mapped to the text/html media type (typically .html files under /content, or pages produced by a content adapter that sets content.mediaType = "text/html") had their body emitted verbatim into the rendered page. A site that ingests HTML content from an untrusted source could therefore be served stored cross-site scripting. This vulnerability is fixed in 0.162.0.

Severity

5.1 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-07 14:44 UTC

CWE

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

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/gohugoio/hugo/security/advisor…	x_refsource_CONFIRM
https://github.com/gohugoio/hugo/commit/e41a06447…	x_refsource_MISC
https://github.com/gohugoio/hugo/releases/tag/v0.162.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
gohugoio	hugo	Affected: < 0.162.0

Show details on NVD website

JSON

To clipboard

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CVE-2026-58402 (GCVE-0-2026-58402)

Vulnerability from cvelistv5 – Published: 2026-07-06 19:19 – Updated: 2026-07-06 20:54

Title

Hugo default code block renderer XSS via unescaped code-fence language

Summary

Hugo is a static site generator. From 0.60.0 until 0.163.3, Hugo's default code-block renderer wrote the Markdown code-fence language or info-string into the code class="language-…" data-lang="…" wrapper without HTML escaping. A fence info-string containing a quote and a script payload breaks out of the attribute and injects a live script element. This issue is fixed in 0.163.3.

Severity

5.1 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-06 20:52 UTC

CWE

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

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/gohugoio/hugo/security/advisor…	x_refsource_CONFIRM
https://github.com/gohugoio/hugo/pull/15051	x_refsource_MISC
https://github.com/gohugoio/hugo/commit/ce1a7e0bc…	x_refsource_MISC
https://github.com/gohugoio/hugo/releases/tag/v0.163.3	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
gohugoio	hugo	Affected: >= 0.60.0, < 0.163.3

Show details on NVD website

JSON

To clipboard

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    "datePublished": "2026-07-06T19:19:58.754Z",
    "dateReserved": "2026-06-30T18:19:58.378Z",
    "dateUpdated": "2026-07-06T20:54:38.775Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-58403 (GCVE-0-2026-58403)

Vulnerability from cvelistv5 – Published: 2026-07-06 19:25 – Updated: 2026-07-06 20:51

Title

Hugo symlink confinement bypass in os.ReadFile

Summary

Hugo is a static site generator. From v0.123.0 through v0.163.0, Hugo's virtual filesystem is designed so that files under a mount cannot reach outside the mount tree, but a regression caused RootMappingFs.statRoot to call Stat, which follows symlinks, instead of Lstat, so a direct os.ReadFile "somefile" where somefile was a symlink pointing outside the mount would return the target's contents. This effectively let a symlink planted inside a theme or local mount read arbitrary files reachable to the user running hugo. This issue is fixed in v0.163.1.

Severity

5.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-06 20:51 UTC

CWE

CWE-59 - Improper Link Resolution Before File Access ('Link Following')

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/gohugoio/hugo/security/advisor…	x_refsource_CONFIRM
https://github.com/gohugoio/hugo/pull/15020	x_refsource_MISC
https://github.com/gohugoio/hugo/commit/cf9c8f93c…	x_refsource_MISC
https://github.com/gohugoio/hugo/releases/tag/v0.163.1	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
gohugoio	hugo	Affected: >= 0.123.0, < 0.163.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
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              "content": {
                "id": "CVE-2026-58403",
                "options": [
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        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
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          ],
          "url": "https://github.com/gohugoio/hugo/security/advisories/GHSA-c3wq-j5vh-68rc"
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          "name": "https://github.com/gohugoio/hugo/pull/15020",
          "tags": [
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            "x_refsource_MISC"
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      "source": {
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        "discovery": "UNKNOWN"
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      "title": "Hugo symlink confinement bypass in os.ReadFile"
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CVE-2026-58404 (GCVE-0-2026-58404)

Vulnerability from cvelistv5 – Published: 2026-07-06 19:16 – Updated: 2026-07-07 15:08

Title

Hugo security.http.urls deny rules bypassed by alternate IPv4 encodings

Summary

Hugo is a static site generator. From v0.162.0 through v0.163.0, the default security.http.urls policy denies requests to loopback, internal, and cloud-metadata IPv4 literals, but the deny rule only matched dotted-decimal notation, so alternate IPv4 encodings of the same addresses, including integer, hex, or octal, passed the policy. When a template passes an untrusted or data-derived URL to resources.GetRemote and the host platform uses the cgo system resolver, these encodings resolve to the blocked address, allowing build-time server-side requests to loopback and internal services, including the cloud-metadata endpoint in hosted or CI builds; the same check is reused on redirects, so the gap also applies to each redirect hop. This issue is fixed in v0.163.1.

Severity

4.6 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-07 15:08 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/gohugoio/hugo/security/advisor…	x_refsource_CONFIRM
https://github.com/gohugoio/hugo/pull/15020	x_refsource_MISC
https://github.com/gohugoio/hugo/commit/a00b5c72a…	x_refsource_MISC
https://github.com/gohugoio/hugo/releases/tag/v0.163.1	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
gohugoio	hugo	Affected: >= v0.162.0, < v0.163.1

Show details on NVD website

JSON

To clipboard

{
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        "metrics": [
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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.

Detection rules are retrieved from Rulezet.

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-2026:36862

CVE-2026-50133 (GCVE-0-2026-50133)

CVE-2026-58402 (GCVE-0-2026-58402)

CVE-2026-58403 (GCVE-0-2026-58403)

CVE-2026-58404 (GCVE-0-2026-58404)

Tags

Sightings

Nomenclature

Related by attack behaviour