CVE-2026-34578

HIGH

8.2

Beschreibung

OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.6, OPNsense's LDAP authentication connector passes the login username directly into an LDAP search filter without calling ldap_escape(). An unauthenticated attacker can inject LDAP filter metacharacters into the username field of the WebGUI login page to enumerate valid LDAP usernames in the configured directory. When the LDAP server configuration includes an Extended Query to restrict login to members of a specific group, the same injection can be used to bypass that group membership restriction and authenticate as any LDAP user whose password is known, regardless of group membership. This vulnerability is fixed in 26.1.6.

CVE Details

CVSS v3.1 Bewertung8.2

SchweregradHIGH

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

AngriffsvektorNETWORK

KomplexitatLOW

Erforderliche PrivilegienNONE

BenutzerinteraktionNONE

Veroffentlicht4/9/2026

Zuletzt geandert4/14/2026

Quellenvd

Honeypot-Sichtungen0

Betroffene Produkte

opnsense:opnsense

Schwachen (CWE)

CWE-90

Referenzen

https://github.com/opnsense/core/commit/016f66cb4620cd48183fa97843f343bb71813c6e(security-advisories@github.com)

https://github.com/opnsense/core/security/advisories/GHSA-jpm7-f59c-mp54(security-advisories@github.com)

https://github.com/opnsense/core/security/advisories/GHSA-jpm7-f59c-mp54(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Korrelationen

Keine Korrelationen erfasst

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