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        "relates_to_product_reference": "Ubuntu-20"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libssh-gcrypt-4-0:0.9.3-2ubuntu2.5.amd64 as a component of Ubuntu 20.04",
          "product_id": "Ubuntu-20:libssh-gcrypt-4-0:0.9.3-2ubuntu2.5.amd64"
        },
        "product_reference": "libssh-gcrypt-4-0:0.9.3-2ubuntu2.5.amd64",
        "relates_to_product_reference": "Ubuntu-20"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libssh-4-0:0.9.3-2ubuntu2.5.amd64 as a component of Ubuntu 20.04",
          "product_id": "Ubuntu-20:libssh-4-0:0.9.3-2ubuntu2.5.amd64"
        },
        "product_reference": "libssh-4-0:0.9.3-2ubuntu2.5.amd64",
        "relates_to_product_reference": "Ubuntu-20"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libssh-dev-0:0.9.3-2ubuntu2.5.amd64 as a component of Ubuntu 20.04",
          "product_id": "Ubuntu-20:libssh-dev-0:0.9.3-2ubuntu2.5.amd64"
        },
        "product_reference": "libssh-dev-0:0.9.3-2ubuntu2.5.amd64",
        "relates_to_product_reference": "Ubuntu-20"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-3731",
      "cwe": {
        "id": "CWE-119",
        "name": "Improper Restriction of Operations within the Bounds of a Memory Buffer"
      },
      "notes": [
        {
          "category": "description",
          "text": "A weakness has been identified in libssh up to 0.11.3. The impacted element is the function sftp_extensions_get_name/sftp_extensions_get_data of the file src/sftp.c of the component SFTP Extension Name Handler. Executing a manipulation of the argument idx can lead to out-of-bounds read. The attack may be performed from remote. Upgrading to version 0.11.4 and 0.12.0 is sufficient to resolve this issue. This patch is called 855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60. You should upgrade the affected component.",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "Ubuntu-20:libssh-4-0:0.9.3-2ubuntu2.5+tuxcare.els3.amd64",
          "Ubuntu-20:libssh-dev-0:0.9.3-2ubuntu2.5+tuxcare.els3.amd64",
          "Ubuntu-20:libssh-doc-0:0.9.3-2ubuntu2.5+tuxcare.els3.all",
          "Ubuntu-20:libssh-gcrypt-4-0:0.9.3-2ubuntu2.5+tuxcare.els3.amd64",
          "Ubuntu-20:libssh-gcrypt-dev-0:0.9.3-2ubuntu2.5+tuxcare.els3.amd64"
        ],
        "known_affected": [
          "Ubuntu-20:libssh-4-0:0.9.3-2ubuntu2.5.amd64",
          "Ubuntu-20:libssh-dev-0:0.9.3-2ubuntu2.5.amd64",
          "Ubuntu-20:libssh-doc-0:0.9.3-2ubuntu2.5.all",
          "Ubuntu-20:libssh-gcrypt-4-0:0.9.3-2ubuntu2.5.amd64",
          "Ubuntu-20:libssh-gcrypt-dev-0:0.9.3-2ubuntu2.5.amd64"
        ],
        "under_investigation": [
          "Ubuntu-20:libssh-4-0:0.9.3-2ubuntu2.5+tuxcare.els1.amd64",
          "Ubuntu-20:libssh-4-0:0.9.3-2ubuntu2.5+tuxcare.els2.amd64",
          "Ubuntu-20:libssh-dev-0:0.9.3-2ubuntu2.5+tuxcare.els1.amd64",
          "Ubuntu-20:libssh-dev-0:0.9.3-2ubuntu2.5+tuxcare.els2.amd64",
          "Ubuntu-20:libssh-doc-0:0.9.3-2ubuntu2.5+tuxcare.els1.all",
          "Ubuntu-20:libssh-doc-0:0.9.3-2ubuntu2.5+tuxcare.els2.all",
          "Ubuntu-20:libssh-gcrypt-4-0:0.9.3-2ubuntu2.5+tuxcare.els1.amd64",
          "Ubuntu-20:libssh-gcrypt-4-0:0.9.3-2ubuntu2.5+tuxcare.els2.amd64",
          "Ubuntu-20:libssh-gcrypt-dev-0:0.9.3-2ubuntu2.5+tuxcare.els1.amd64",
          "Ubuntu-20:libssh-gcrypt-dev-0:0.9.3-2ubuntu2.5+tuxcare.els2.amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-3731"
        },
        {
          "category": "external",
          "summary": "https://gitlab.com/libssh/libssh-mirror/-/commit/855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60",
          "url": "https://gitlab.com/libssh/libssh-mirror/-/commit/855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60"
        },
        {
          "category": "external",
          "summary": "https://vuldb.com/?ctiid.349709",
          "url": "https://vuldb.com/?ctiid.349709"
        },
        {
          "category": "external",
          "summary": "https://vuldb.com/?id.349709",
          "url": "https://vuldb.com/?id.349709"
        },
        {
          "category": "external",
          "summary": "https://vuldb.com/?submit.767120",
          "url": "https://vuldb.com/?submit.767120"
        },
        {
          "category": "external",
          "summary": "https://www.libssh.org/files/0.12/libssh-0.12.0.tar.xz",
          "url": "https://www.libssh.org/files/0.12/libssh-0.12.0.tar.xz"
        },
        {
          "category": "external",
          "summary": "https://www.libssh.org/security/advisories/libssh-2026-sftp-extensions.txt",
          "url": "https://www.libssh.org/security/advisories/libssh-2026-sftp-extensions.txt"
        }
      ],
      "release_date": "2026-03-08T11:15:00Z",
      "remediations": [
        {
          "category": "none_available",
          "details": "Affected",
          "product_ids": [
            "Ubuntu-20:libssh-4-0:0.9.3-2ubuntu2.5+tuxcare.els1.amd64",
            "Ubuntu-20:libssh-4-0:0.9.3-2ubuntu2.5+tuxcare.els2.amd64",
            "Ubuntu-20:libssh-4-0:0.9.3-2ubuntu2.5.amd64",
            "Ubuntu-20:libssh-dev-0:0.9.3-2ubuntu2.5+tuxcare.els1.amd64",
            "Ubuntu-20:libssh-dev-0:0.9.3-2ubuntu2.5+tuxcare.els2.amd64",
            "Ubuntu-20:libssh-dev-0:0.9.3-2ubuntu2.5.amd64",
            "Ubuntu-20:libssh-doc-0:0.9.3-2ubuntu2.5+tuxcare.els1.all",
            "Ubuntu-20:libssh-doc-0:0.9.3-2ubuntu2.5+tuxcare.els2.all",
            "Ubuntu-20:libssh-doc-0:0.9.3-2ubuntu2.5.all",
            "Ubuntu-20:libssh-gcrypt-4-0:0.9.3-2ubuntu2.5+tuxcare.els1.amd64",
            "Ubuntu-20:libssh-gcrypt-4-0:0.9.3-2ubuntu2.5+tuxcare.els2.amd64",
            "Ubuntu-20:libssh-gcrypt-4-0:0.9.3-2ubuntu2.5.amd64",
            "Ubuntu-20:libssh-gcrypt-dev-0:0.9.3-2ubuntu2.5+tuxcare.els1.amd64",
            "Ubuntu-20:libssh-gcrypt-dev-0:0.9.3-2ubuntu2.5+tuxcare.els2.amd64",
            "Ubuntu-20:libssh-gcrypt-dev-0:0.9.3-2ubuntu2.5.amd64"
          ]
        },
        {
          "category": "vendor_fix",
          "date": "2026-03-20T11:52:09.545275Z",
          "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1774007526",
          "product_ids": [
            "Ubuntu-20:libssh-4-0:0.9.3-2ubuntu2.5+tuxcare.els3.amd64",
            "Ubuntu-20:libssh-dev-0:0.9.3-2ubuntu2.5+tuxcare.els3.amd64",
            "Ubuntu-20:libssh-doc-0:0.9.3-2ubuntu2.5+tuxcare.els3.all",
            "Ubuntu-20:libssh-gcrypt-4-0:0.9.3-2ubuntu2.5+tuxcare.els3.amd64",
            "Ubuntu-20:libssh-gcrypt-dev-0:0.9.3-2ubuntu2.5+tuxcare.els3.amd64"
          ],
          "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1774007526"
        }
      ],
      "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": [
            "Ubuntu-20:libssh-4-0:0.9.3-2ubuntu2.5+tuxcare.els1.amd64",
            "Ubuntu-20:libssh-4-0:0.9.3-2ubuntu2.5+tuxcare.els2.amd64",
            "Ubuntu-20:libssh-4-0:0.9.3-2ubuntu2.5+tuxcare.els3.amd64",
            "Ubuntu-20:libssh-4-0:0.9.3-2ubuntu2.5.amd64",
            "Ubuntu-20:libssh-dev-0:0.9.3-2ubuntu2.5+tuxcare.els1.amd64",
            "Ubuntu-20:libssh-dev-0:0.9.3-2ubuntu2.5+tuxcare.els2.amd64",
            "Ubuntu-20:libssh-dev-0:0.9.3-2ubuntu2.5+tuxcare.els3.amd64",
            "Ubuntu-20:libssh-dev-0:0.9.3-2ubuntu2.5.amd64",
            "Ubuntu-20:libssh-doc-0:0.9.3-2ubuntu2.5+tuxcare.els1.all",
            "Ubuntu-20:libssh-doc-0:0.9.3-2ubuntu2.5+tuxcare.els2.all",
            "Ubuntu-20:libssh-doc-0:0.9.3-2ubuntu2.5+tuxcare.els3.all",
            "Ubuntu-20:libssh-doc-0:0.9.3-2ubuntu2.5.all",
            "Ubuntu-20:libssh-gcrypt-4-0:0.9.3-2ubuntu2.5+tuxcare.els1.amd64",
            "Ubuntu-20:libssh-gcrypt-4-0:0.9.3-2ubuntu2.5+tuxcare.els2.amd64",
            "Ubuntu-20:libssh-gcrypt-4-0:0.9.3-2ubuntu2.5+tuxcare.els3.amd64",
            "Ubuntu-20:libssh-gcrypt-4-0:0.9.3-2ubuntu2.5.amd64",
            "Ubuntu-20:libssh-gcrypt-dev-0:0.9.3-2ubuntu2.5+tuxcare.els1.amd64",
            "Ubuntu-20:libssh-gcrypt-dev-0:0.9.3-2ubuntu2.5+tuxcare.els2.amd64",
            "Ubuntu-20:libssh-gcrypt-dev-0:0.9.3-2ubuntu2.5+tuxcare.els3.amd64",
            "Ubuntu-20:libssh-gcrypt-dev-0:0.9.3-2ubuntu2.5.amd64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ]
    }
  ]
}