{"id":"CVE-2026-109357","revision":"ae0efefc495c4751b43f3a0460cae048","records":[{"revision":"ae0efefc495c4751b43f3a0460cae048","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-109357","aliases":[],"title":"LibreNMS before 26.9.0 LDAP Filter Injection Authentication Bypass via Authorization Header","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.","state":0,"publishedAt":"2026-10-12T16:05:37.653+00:00","modifiedAt":"2026-10-15T02:53:11.147+00:00","affected":[{"ecosystem":"Vendor product","name":"librenms","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"librenms\",\n                    \"product\": \"librenms\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"26.9.0\"\n                        },\n                        {\n                            \"version\": \"26.9.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":9.2,"severity":"CRITICAL"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.1,"severity":"HIGH"}],"references":["https://github.com/librenms/librenms/security/advisories/GHSA-7cmx-65c5-8h8v","https://www.vulncheck.com/advisories/librenms-before-26.9.0-ldap-filter-injection-authentication-bypass-via-authorization-header"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-109357","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-109357","identifiers":["CVE-2026-109357"]},"retained":false,"historicalAffected":[]}],"coverage":[]}