CVE-2026-109357 LibreNMS - Authentication Bypass

LibreNMS < 26.9.0 contains an LDAP injection caused by unescaped usernames in LDAP search filters in ldap-authorization and ad-authorization modes, letting unauthenticated attackers gain admin access via wildcard username, exploit requires REMOTE_USER not forwarded.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.46% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Broken Access Control
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
12 October 2026
Updated
15 October 2026
Weakness
CWE-90

Vendor fix

Update to version 26.9.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs