CVE-2026-108715

LibreNMS through 26.9.1.1 contains an authorization bypass vulnerability in includes/html/graphs/smokeping/auth.inc.php that checks the src probe device instead of the rendered target device. Restricted users permitted on a probe device can request smokeping_in or smokeping_out graphs with arbitrary device ids to view latency data and enumerate device names.

• https://github.com/librenms/librenms
• https://github.com/librenms/librenms/blob/26.9.1.1/LibreNMS/Util/Graph.php#L190-L198
• https://github.com/librenms/librenms/blob/26.9.1.1/includes/html/graphs/smokeping/auth.inc.php#L3-L7
• https://hackmd.io/@haind/librenms-smokeping-graph-src-device-auth-confusion
• https://www.vulncheck.com/advisories/librenms-through-26.9.1.1-authorization-bypass-via-smokeping-graph-auth-inc-php