CVE-2026-86426 — LibreNMS before 26.8.0 Authentication Bypass via API Token Type Confusion
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 val…
Published: 2026-09-07 · CVSS: 9.2 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7