CVE-2026-88006: Open WebUI OAuth role management bypass vulnerability

# CVE-2026-88006: Open WebUI OAuth role management bypass vulnerability

https://gcdradar.vercel.app/incidents/cve-2026-88006-open-webui-oauth-role-management-bypass-vulne · AIR-2026-0104 · closed 2026-09-10

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-09-10
- AI role: Attack on AI
- Products: Open WebUI
- CVE ids: CVE-2026-88006
- CVSS: 6.5

## Summary

Open WebUI's OAuth token exchange endpoint issues sessions for provider access tokens without running normal role management callbacks. This allows users to obtain sessions with existing roles even if provider roles would normally be demoted or refused.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-09-10: CVE-2026-88006: Open WebUI: Users denied by the OAuth role policy can still sign in via token exchange (https://github.com/advisories/GHSA-wvm9-9g5j-623f)
- 2026-09-10: CVE-2026-88006: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. (https://nvd.nist.gov/vuln/detail/CVE-2026-88006)

## Sources

- 2026-09-10 NVD: CVE-2026-88006: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. https://nvd.nist.gov/vuln/detail/CVE-2026-88006
- 2026-09-10 GitHub Advisory Database: CVE-2026-88006: Open WebUI: Users denied by the OAuth role policy can still sign in via token exchange https://github.com/advisories/GHSA-wvm9-9g5j-623f

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.