CVEvulnerability

CVE-2026-45339

6.5 MEDIUM Published 2026-05-15 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-05-15
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Weaknesses
CWE-863

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, Open WebUI allows admins to restrict which API endpoints an API key can access. When an API key is restricted from /api/v1/messages, requests using the Authorization: Bearer sk-... header are correctly blocked with 403. However, the same key sent via the x-api-key header bypasses the restriction entirely — the request is authenticated, the model is invoked, and a full response is returned. This vulnerability is fixed in 0.9.0.

Affected configurations

• openwebui open webui (< 0.9.0)

Related

Weakness · CWE (1)

  • CWE-863 Incorrect Authorization weakness

References