CVE-2026-44563: Open WebUI Ollama Model Access Control Bypass

# CVE-2026-44563: Open WebUI Ollama Model Access Control Bypass

https://gcdradar.vercel.app/incidents/cve-2026-44563-open-webui-ollama-model-access-control-bypass · AIR-2026-0639 · closed 2026-05-08

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-05-08
- AI role: Attack on AI
- Products: Open WebUI, Ollama
- CVE ids: CVE-2026-44563
- CVSS: 5.4

## Summary

Open WebUI suffers from a model access control bypass vulnerability across several Ollama proxy endpoints. Users should upgrade to a fixed version to prevent unauthorized model access.

## What to do

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

## Latest updates

- 2026-05-15: CVE-2026-44563: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. (https://nvd.nist.gov/vuln/detail/CVE-2026-44563)
- 2026-05-08: CVE-2026-44563: Open WebUI's Ollama Model Access Control Bypass via /api/generate, /api/embed, /api/embeddings, and /api/show (https://github.com/advisories/GHSA-rcvp-6fgw-c7fh)

## Sources

- 2026-05-08 GitHub Advisory Database: CVE-2026-44563: Open WebUI's Ollama Model Access Control Bypass via /api/generate, /api/embed, /api/embeddings, and /api/show https://github.com/advisories/GHSA-rcvp-6fgw-c7fh
- 2026-05-15 NVD: CVE-2026-44563: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. https://nvd.nist.gov/vuln/detail/CVE-2026-44563

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