CVE-2026-70491: Open WebUI leaks full Python tool source to non-admin users

# CVE-2026-70491: Open WebUI leaks full Python tool source to non-admin users

https://gcdradar.vercel.app/incidents/cve-2026-70491-open-webui-leaks-full-python-tool-source-to-n · AIR-2026-0048 · closed 2026-08-04

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-08-04
- AI role: Attack on AI
- Products: Open WebUI
- CVE ids: CVE-2026-70491
- CVSS: 6.5

## Summary

Open WebUI versions 0.10.2 and earlier improperly exposed server-side Python tool source code to authenticated read-only non-admin users. The vulnerability has been addressed in updated releases.

## What to do

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

## Latest updates

- 2026-08-04: CVE-2026-70491: Open WebUI: Tool source code disclosed to read-only users via the tool list and get endpoints (https://github.com/advisories/GHSA-3r7g-q6cg-q2vx)
- 2026-08-04: CVE-2026-70491: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. (https://nvd.nist.gov/vuln/detail/CVE-2026-70491)

## Sources

- 2026-08-04 NVD: CVE-2026-70491: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. https://nvd.nist.gov/vuln/detail/CVE-2026-70491
- 2026-08-04 GitHub Advisory Database: CVE-2026-70491: Open WebUI: Tool source code disclosed to read-only users via the tool list and get endpoints https://github.com/advisories/GHSA-3r7g-q6cg-q2vx

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