CVEvulnerability

CVE-2026-45675

8.1 HIGH Published 2026-05-15 Modified 2026-06-18 Official page ↗
Status
Modified
Published
2026-05-15
Last modified
2026-06-18
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.1 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-269, CWE-362

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the LDAP and OAuth authentication flows use a TOCTOU (Time-of-Check-Time-of-Use) pattern for first-user admin role assignment. The regular signup handler (signup_handler in auths.py, line 663) was explicitly patched to prevent this race with the comment "Insert with default role first to avoid TOCTOU race", but the LDAP and OAuth code paths were never updated with the same fix. This vulnerability is fixed in 0.9.0.

Affected configurations

• openwebui open webui (< 0.9.0)

Related

Weakness · CWE (2)

  • CWE-269 Improper Privilege Management weakness
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization weakness

References