{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "21.6.0"
              },
              {
                "fixed": "26.5.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "fb2608ee3dafbaaeba51421fed1d221218699c39"
            },
            {
              "fixed": "868e3b966a"
            },
            {
              "fixed": "403fa2ddf262d4cbd7e1748ed7678468cc7248d1"
            }
          ],
          "repo": "https://github.com/librenms/librenms",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-c9fv-cgmm-2wg7"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-77"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55182.json"
  },
  "details": "LibreNMS is a network monitoring system. In versions from 21.6.0 up to 26.5.0, the Signal alert transport is vulnerable to command injection because the signal-cli path and the Recipient field of an alert transport entry are insufficiently escaped before being passed to an exec call. An authenticated administrator can craft a transport entry whose Recipient contains shell metacharacters and whose path points to the bundled composer_wrapper.php script, which itself passes attacker-controlled input to further unsafe exec calls. By chaining these calls, the administrator can execute arbitrary operating-system commands on the LibreNMS host. This issue is fixed in version 26.5.0.",
  "id": "CVE-2026-55182",
  "modified": "2026-08-28T03:30:30.067902093Z",
  "published": "2026-08-26T21:50:04.014Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/librenms/librenms/releases/tag/26.5.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55182.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/librenms/librenms/security/advisories/GHSA-c9fv-cgmm-2wg7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55182"
    },
    {
      "type": "FIX",
      "url": "https://github.com/librenms/librenms/commit/868e3b966a"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "LibreNMS: Remote Code Execution by Signal Alert Transportation Module"
}