CVE-2026-44551 — Open WebUI: LDAP Empty Password Authentication Bypass

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
open-webui / open-webui	affected < 0.9.0

CWE

CWE-287

References

https://github.com/open-webui/open-webui/security/advisories/GHSA-2r4p-jpmg-48f4

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.