BREW-LIBSSH2-CVE-2026-7598 (CVE-2026-7598)

Vulnerability from osv_homebrew – Published: 2026-07-18 04:02 – Updated: 2026-09-02 06:49 – Source website
VLAI
Summary
libssh2 userauth.c userauth_password integer overflow
Details

A security vulnerability has been detected in libssh2 up to 1.11.1. The impacted element is the function userauth_password of the file src/userauth.c. Such manipulation of the argument username_len/password_len leads to integer overflow. The attack may be launched remotely. The name of the patch is 256d04b60d80bf1190e96b0ad1e91b2174d744b1. A patch should be applied to remediate this issue.

Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "patch",
        "patches": [
          {
            "type": "backport",
            "url": "https://github.com/libssh2/libssh2/commit/256d04b60d80bf1190e96b0ad1e91b2174d744b1.patch?full_index=1"
          }
        ]
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "libssh2",
        "purl": "pkg:brew/libssh2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.11.1_3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "source": "generated"
  },
  "details": "A security vulnerability has been detected in libssh2 up to 1.11.1. The impacted element is the function userauth_password of the file src/userauth.c. Such manipulation of the argument username_len/password_len leads to integer overflow. The attack may be launched remotely. The name of the patch is 256d04b60d80bf1190e96b0ad1e91b2174d744b1. A patch should be applied to remediate this issue.",
  "id": "BREW-libssh2-CVE-2026-7598",
  "modified": "2026-09-02T06:49:44Z",
  "published": "2026-07-18T04:02:33Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/libssh2/libssh2/"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7598.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:16736"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:61752"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:7021"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/security/cve/CVE-2026-7598"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/7xxx/CVE-2026-7598.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-7598"
    },
    {
      "type": "ADVISORY",
      "url": "https://vuldb.com/submit/805564"
    },
    {
      "type": "ADVISORY",
      "url": "https://vuldb.com/vuln/360555"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464597"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/vuln/360555/cti"
    },
    {
      "type": "FIX",
      "url": "https://github.com/libssh2/libssh2/commit/256d04b60d80bf1190e96b0ad1e91b2174d744b1"
    },
    {
      "type": "FIX",
      "url": "https://github.com/libssh2/libssh2/pull/1858"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X",
      "type": "CVSS_V4"
    }
  ],
  "summary": "libssh2 userauth.c userauth_password integer overflow",
  "upstream": [
    "CVE-2026-7598"
  ]
}



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