CVE-2026-55182: Improper Neutralization of Special Elements used in a Command

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...

GHSA-C9FV-CGMM-2WG7 LibreNMS Vulnerable to Remote Code Execution by Signal Alert Transportation module

Summary A vulnerability has been identified that allows an authenticated administrator to execute arbitrary code on the host server. By adding an alert transport entry, an attacker with administrative privileges can execute malicious commands. Details The vulnerability is caused by an unsafe exec...