{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0.27.0"
              },
              {
                "last_affected": "1.9.0"
              },
              {
                "introduced": "v0.27.0"
              },
              {
                "fixed": "v1.9.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION"
            ]
          },
          "events": [
            {
              "introduced": "6311e886d8b5377c6037cd9937ccf66a71f3361d"
            },
            {
              "fixed": "338e6fb681369ff0537719095e22ce9dc602dbf0"
            }
          ],
          "repo": "https://github.com/libgit2/libgit2",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-78"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5917.json"
  },
  "details": "libgit2 versions v0.27.0 through v1.9.0 built with the libssh2 SSH backend (USE_SSH=libssh2) contain a shell command injection vulnerability that allows remote attackers to execute arbitrary commands on an SSH server by supplying a repository path containing unescaped shell metacharacters such as single quotes, semicolons, or pipes. The gen_proto() function in ssh_libssh2.c inserts the repository path directly into a shell command string without escaping special characters before passing it to libssh2_channel_exec(), enabling an attacker to craft a malicious submodule URL in a .gitmodules file that, when processed during a recursive clone, causes the remote server's shell to interpret injected commands under the victim's SSH user account.",
  "id": "CVE-2026-5917",
  "modified": "2026-08-15T04:06:59.523228507Z",
  "published": "2026-08-11T21:40:29.078Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5917.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-5917"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/libgit2-shell-command-injection-via-ssh-libssh2-backend"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/libgit2/libgit2"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
      "type": "CVSS_V4"
    }
  ],
  "summary": "libgit2 v0.27.0-v1.9.0 Shell Command Injection via ssh_libssh2 Backend"
}