{"api_version":"1","generated_at":"2026-08-27T03:54:35+00:00","cve":"CVE-2026-55182","urls":{"html":"https://cve.report/CVE-2026-55182","api":"https://cve.report/api/cve/CVE-2026-55182.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-55182","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-55182"},"summary":{"title":"LibreNMS: Remote Code Execution by Signal Alert Transportation Module","description":"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. 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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.","Type":"Description","Title":"LibreNMS: Remote Code Execution by Signal Alert Transportation M"}]}}}