CVE-2026-59225: Open WebUI Arena task endpoints bypass model access controls

# CVE-2026-59225: Open WebUI Arena task endpoints bypass model access controls

https://gcdradar.vercel.app/incidents/cve-2026-59225-open-webui-arena-task-endpoints-bypass-model · AIR-2026-0855 · closed 2026-07-09

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-07-09 (happened 2026-07-24)
- AI role: Attack on AI
- Products: Open WebUI
- CVE ids: CVE-2026-59225
- CVSS: 5.4

## Summary

An access control bypass vulnerability in Open WebUI permits authenticated non-admin users to reach restricted underlying models through specific task endpoints. The issue is covered by a security advisory without confirmed active exploitation.

## What to do

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

## Latest updates

- 2026-07-24: CVE-2026-59225: Open WebUI: Arena task endpoints can bypass underlying model access controls (https://github.com/advisories/GHSA-m3qf-58wf-w979)
- 2026-07-09: CVE-2026-59225: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. (https://nvd.nist.gov/vuln/detail/CVE-2026-59225)

## Sources

- 2026-07-09 NVD: CVE-2026-59225: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. https://nvd.nist.gov/vuln/detail/CVE-2026-59225
- 2026-07-24 GitHub Advisory Database: CVE-2026-59225: Open WebUI: Arena task endpoints can bypass underlying model access controls https://github.com/advisories/GHSA-m3qf-58wf-w979

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