{"id":"CVE-2026-109357","published":"2026-10-12T17:17:33.020","lastModified":"2026-10-15T20:33:06.527","description":"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.","cvssScore":8.1,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-90"],"vendors":[],"products":[],"references":[{"url":"https://github.com/librenms/librenms/security/advisories/GHSA-7cmx-65c5-8h8v","tags":[]},{"url":"https://www.vulncheck.com/advisories/librenms-before-26.9.0-ldap-filter-injection-authentication-bypass-via-authorization-header","tags":[]},{"url":"https://github.com/librenms/librenms/security/advisories/GHSA-7cmx-65c5-8h8v","tags":[]}],"exploitRefs":[{"url":"https://github.com/librenms/librenms/security/advisories/GHSA-7cmx-65c5-8h8v","tags":[]},{"url":"https://github.com/librenms/librenms/security/advisories/GHSA-7cmx-65c5-8h8v","tags":[]}],"hasPoc":true,"ai":null}