CVE-2026-88006CWE-863broken-access-control

CVE-2026-88006

Medium · published September 10, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
29.9
In the wild
Unconfirmed
What it is

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.0 until 0.11.1, Open WebUI's OAuth token exchange endpoint issues a session for a provider access token without running the OAuth role management that the normal OAuth login callback runs. A user whose provider roles the login callback would refuse, or would demote, could still obtain a working session at their existing role through this endpoint. This issue is fixed in version 0.11.1.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00371 · 29.9th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-09-10T19:17Z
Affected products (1)
ProductVersionsFixed in
openwebui/open_webui≥ 0.8.0, < 0.11.10.11.1
References (3)
https://github.com/open-webui/open-webui/commit/d799e81edbdc971c6deb096b6474cd95b93504bf · [email protected]https://github.com/open-webui/open-webui/releases/tag/v0.11.1 · [email protected]https://github.com/open-webui/open-webui/security/advisories/GHSA-wvm9-9g5j-623f · [email protected]
EPSS history
Timeline
  • 12 SEP 03:22Z
    EPSS moved — → 0%
    epss
  • 10 SEP 14:43Z
    Open WebUI: Users denied by the OAuth role policy can still sign in via token exchange
    cvelistv5