CVE-2026-109357 — LibreNMS before 26.9.0 LDAP Filter Injection Authentication Bypass via Authorization Header
LibreNMS before 26.9.0 contains an LDAP filter injection in ldap-authorization and ad-authorization modes because usernames are inserted unescaped into LDAP search filters and a…
Published: 2026-10-12 · CVSS: 9.2 · CVSS 4.0
LibreNMS before 26.9.0 contains an LDAP filter injection in ldap-authorization and ad-authorization modes because usernames are inserted unescaped into LDAP search filters and authentication only checks user existence. When REMOTE_USER is not forwarded, unauthenticated attackers can send a wildcard username via HTTP Basic Authorization (PHP_AUTH_USER) to match all users and groups and gain admin access.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7