CVE-2026-109357GHSA-7CMX-65C5-8H8V
LibreNMS before 26.9.0 LDAP Filter Injection Authentication Bypass via Authorization Header
- Published
- Last modified
- Status
- published
- Known exploitation
- Not listed in CISA KEV
- Fix
- Fixed in 26.9.0
- Public exploit
- None on Exploit-DB
CISA SSVC
- Exploitation: poc
- Automatable: no
- Technical impact: total
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Decision points from CISA's Vulnrichment, assessed (SSVC 2.0.3).
SSVC documentationSummary
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.
Affected versions
- librenms librenms
fixed in 26.9.0