CVE-2026-70487: Open WebUI unauthorized knowledge file access vulnerability

# CVE-2026-70487: Open WebUI unauthorized knowledge file access vulnerability

https://gcdradar.vercel.app/incidents/cve-2026-70487-open-webui-unauthorized-knowledge-file-access · AIR-2026-0056 · 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-2026-70487
- CVSS: 5.3

## Summary

Open WebUI metadata handling allowed authenticated users to query indexed chunks from other users' files via file IDs. The issue was resolved in version 0.11.0.

## What to do

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

## Latest updates

- 2026-08-04: CVE-2026-70487: Open WebUI: Cross-user file content disclosure via request-scoped direct model knowledge metadata (https://github.com/advisories/GHSA-6xhv-rxhv-pwm4)
- 2026-08-04: CVE-2026-70487: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. (https://nvd.nist.gov/vuln/detail/CVE-2026-70487)

## Sources

- 2026-08-04 NVD: CVE-2026-70487: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. https://nvd.nist.gov/vuln/detail/CVE-2026-70487
- 2026-08-04 GitHub Advisory Database: CVE-2026-70487: Open WebUI: Cross-user file content disclosure via request-scoped direct model knowledge metadata https://github.com/advisories/GHSA-6xhv-rxhv-pwm4

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