Librenms: >> Librenms >> 26.2.0 Security Vulnerabilities
LibreNMS before 26.8.0 contains an authentication bypass vulnerability in the REST API that allows unauthenticated attackers to access protected endpoints by sending numeric values instead of string tokens. Attackers can exploit MySQL type coercion by sending small integers like 0 through 9 to match token hashes, gaining access to API functionality including device credentials and administrative features that enable remote code execution through alert templates.
CVSS Score
9.2
EPSS Score
0.039
Published
2026-09-07
LibreNMS before 26.8.0 contains an argument injection vulnerability in the graph_title parameter that allows authenticated attackers to inject arbitrary rrdtool arguments by breaking out of double-quote escaping. Attackers can inject DEF and LINE arguments to read RRD files from unauthorized devices, or use newline injection to execute arbitrary rrdtool commands, bypassing per-device authorization checks.
CVSS Score
8.7
EPSS Score
0.006
Published
2026-09-07
LibreNMS versions before 26.3.0 are affected by an authenticated remote code execution vulnerability by abusing the Binary Locations config and the Netcommand feature. Successful exploitation requires administrative privileges. Exploitation could result in compromise of the underlying web server.
CVSS Score
8.5
EPSS Score
0.009
Published
2026-04-13
LibreNMS versions before 26.3.0 are affected by an authenticated Cross-site Scripting vulnerability on the showconfig page. Successful exploitation requires administrative privileges. Exploitation could result in XSS attacks being performed against other users with access to the page.
CVSS Score
4.6
EPSS Score
0.003
Published
2026-04-13