Vulnerability-Lookup

OESA-2026-3746 (CVE-2026-73282)

Vulnerability from osv_openeuler – Published: 2026-09-14 16:33 – Updated: 2026-09-14 16:33 – Source website

Summary

openssh security update

Details

An open source implementation of SSH protocol version 2

Security Fix(es):

In ssh in OpenSSH before 10.5, a use-after-free for realloc data can occur if a certain pair of remote-forwarding operations are concurrent.(CVE-2026-73282)

In sshd in OpenSSH before 10.5, the restrict keyword (in authorized_keys) was supposed to be applicable to tunnel forwarding but was not.(CVE-2026-73283)

Severity

4.8 (Medium)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-73282	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-73283	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "openssh-9.6p1-23.oe2403sp1.aarch64.rpm",
          "openssh-askpass-9.6p1-23.oe2403sp1.aarch64.rpm",
          "openssh-clients-9.6p1-23.oe2403sp1.aarch64.rpm",
          "openssh-debuginfo-9.6p1-23.oe2403sp1.aarch64.rpm",
          "openssh-debugsource-9.6p1-23.oe2403sp1.aarch64.rpm",
          "openssh-keycat-9.6p1-23.oe2403sp1.aarch64.rpm",
          "openssh-server-9.6p1-23.oe2403sp1.aarch64.rpm",
          "pam_ssh_agent_auth-0.10.4-5.23.oe2403sp1.aarch64.rpm"
        ],
        "noarch": [
          "openssh-help-9.6p1-23.oe2403sp1.noarch.rpm"
        ],
        "src": [
          "openssh-9.6p1-23.oe2403sp1.src.rpm"
        ],
        "x86_64": [
          "openssh-9.6p1-23.oe2403sp1.x86_64.rpm",
          "openssh-askpass-9.6p1-23.oe2403sp1.x86_64.rpm",
          "openssh-clients-9.6p1-23.oe2403sp1.x86_64.rpm",
          "openssh-debuginfo-9.6p1-23.oe2403sp1.x86_64.rpm",
          "openssh-debugsource-9.6p1-23.oe2403sp1.x86_64.rpm",
          "openssh-keycat-9.6p1-23.oe2403sp1.x86_64.rpm",
          "openssh-server-9.6p1-23.oe2403sp1.x86_64.rpm",
          "pam_ssh_agent_auth-0.10.4-5.23.oe2403sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP1",
        "name": "openssh",
        "purl": "pkg:rpm/openEuler/openssh\u0026distro=openEuler-24.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.6p1-23.oe2403sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "An open source implementation of SSH protocol version 2\r\n\r\nSecurity Fix(es):\n\nIn ssh in OpenSSH before 10.5, a use-after-free for realloc data can occur if a certain pair of remote-forwarding operations are concurrent.(CVE-2026-73282)\n\nIn sshd in OpenSSH before 10.5, the restrict keyword (in authorized_keys) was supposed to be applicable to tunnel forwarding but was not.(CVE-2026-73283)",
  "id": "OESA-2026-3746",
  "modified": "2026-09-14T16:33:57Z",
  "published": "2026-09-14T16:33:57Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3746"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73282"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73283"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "openssh security update",
  "upstream": [
    "CVE-2026-73282",
    "CVE-2026-73283"
  ]
}

CVE-2026-73282 (GCVE-0-2026-73282)

Vulnerability from cvelistv5 – Published: 2026-08-11 19:12 – Updated: 2026-08-11 20:17

Summary

In ssh in OpenSSH before 10.5, a use-after-free for realloc data can occur if a certain pair of remote-forwarding operations are concurrent.

Severity

4.8 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-11 20:17 UTC

CWE

CWE-416 - Use After Free

Assigner

mitre mitre root

References

1 reference

URL	Tags
https://www.openssh.org/releasenotes.html#10.5

Impacted products

1 product

Vendor	Product	Version
OpenBSD	OpenSSH	Affected: 0 , < 10.5 (custom) cpe:2.3:a:openbsd:openssh::::::::

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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        "metrics": [
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              "content": {
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                  },
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      ],
      "metrics": [
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          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.8,
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            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
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    "cveId": "CVE-2026-73282",
    "datePublished": "2026-08-11T19:12:24.334Z",
    "dateReserved": "2026-08-11T19:12:24.011Z",
    "dateUpdated": "2026-08-11T20:17:22.196Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-73283 (GCVE-0-2026-73283)

Vulnerability from cvelistv5 – Published: 2026-08-11 19:15 – Updated: 2026-08-11 20:16

Summary

In sshd in OpenSSH before 10.5, the restrict keyword (in authorized_keys) was supposed to be applicable to tunnel forwarding but was not.

Severity

2.5 (Low)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-11 20:16 UTC

CWE

CWE-670 - Always-Incorrect Control Flow Implementation

Assigner

mitre mitre root

References

1 reference

URL	Tags
https://www.openssh.org/releasenotes.html#10.5

Impacted products

1 product

Vendor	Product	Version
OpenBSD	OpenSSH	Affected: 0 , < 10.5 (custom) cpe:2.3:a:openbsd:openssh::::::::

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-73283",
                "options": [
                  {
                    "Exploitation": "none"
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-11T20:16:49.734390Z",
                "version": "2.0.3"
              },
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          "shortName": "CISA-ADP"
        },
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      }
    ],
    "cna": {
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          "defaultStatus": "unaffected",
          "product": "OpenSSH",
          "vendor": "OpenBSD",
          "versions": [
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              "lessThan": "10.5",
              "status": "affected",
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          ]
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      "cpeApplicability": [
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        }
      ],
      "metrics": [
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          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
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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

OESA-2026-3746 (CVE-2026-73282)

CVE-2026-73282 (GCVE-0-2026-73282)

CVE-2026-73283 (GCVE-0-2026-73283)

Tags

Sightings

Nomenclature

Related by attack behaviour