CVE-2026-109357

HIGHCVSS 8.1

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.

Timeline

Published:October 12th, 2026 5:17 PM

Last modified:October 15th, 2026 8:33 PM

CVSS Scoring

CVSS v3: 8.1 (HIGH)

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

CWE-90

References & Reports

Advisories, patches, and third-party reports

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
https://github.com/librenms/librenms/security/advisories/GHSA-7cmx-65c5-8h8v

Source: NIST NVD · Data may lag official sources by up to one minute