CVE-2026-44551

CriticalCVSS 9.1/10Last modified Jun 17, 2026

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the LDAP authentication endpoint does not validate that the submitted password is non-empty before performing a Simple Bind against the LDAP server. The LdapForm Pydantic model accepts password: str with no minimum length constraint, so an empty string passes validation. The subsequent Connection.bind() call succeeds on vulnerable LDAP servers, and the application issues a full session token for the target user. This vulnerability is fixed in 0.9.0.

Metrics

CVSS 3.1 9.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-287

Affected software

No affected versions have been published.

Timeline

Published
May 15, 2026
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2026-44551: Critical severity, CVSS 9.1 | Vulnix