Open WebUI 0.11.1 before 0.11.4 Authorization Bypass via OAuth Token Exchange
Open WebUI from 0.11.1 before 0.11.4 contains an authorization bypass in the OAuth token exchange endpoint, which reads role claims only from the provider's userinfo response and keeps the user's existing role when no roles claim is found, ignoring roles sent only in the ID token. Users with a linked account whose identity provider role no longer satisfies the OAuth role policy can send a valid provider access token to POST /api/v1/auths/oauth/{provider}/token/exchange to obtain a session retaining their previous role.
CVE-2026-109283
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-109283
open-webui
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "open-webui",
"product": "open-webui",
"versions": [
{
"status": "affected",
"version": "0.11.1",
"lessThan": "0.11.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "0.11.4",
"versionType": "semver"
}
],
"packageURL": "pkg:pypi/open-webui",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-109283
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #53305 · Revision 1
- Added to Heist Feed
- Publisher date