CVE WatchOct 15, 2026

CVE-2026-109357

LibreNMS before 26.9.0 contains an LDAP filter injection in ldap-authorization and ad-authorization modes because usernames are inserted une

CVSS

8.1

High

EPSS

0.5%

p38

KEV

—

Exploit Today

0-100

Published: Oct 12, 2026 · Last modified: Oct 15, 2026 · CWE-90

EPSS · 30d

0.5%EPSS · 30 days0.5%

2026-10-132026-10-20

Technical 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.

Official references

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