CVE-2026-34578

HIGH

8.2

Descripcion

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.

Detalles CVE

Puntuacion CVSS v3.18.2

SeveridadHIGH

Vector CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Vector de ataqueNETWORK

ComplejidadLOW

Privilegios requeridosNONE

Interaccion usuarioNONE

Publicado4/9/2026

Ultima modificacion4/14/2026

Fuentenvd

Avistamientos honeypot0

Productos afectados

opnsense:opnsense

Debilidades (CWE)

CWE-90

Referencias

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)

Correlaciones IOC

Sin correlaciones registradas

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