Open WebUI SSRF vulnerability via unvalidated HTTP redirect targets

# Open WebUI SSRF vulnerability via unvalidated HTTP redirect targets

https://gcdradar.vercel.app/incidents/open-webui-ssrf-vulnerability-via-unvalidated-http-redirect · AIR-2026-0907 · closed 2026-09-09

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-09-09
- AI role: Attack on AI
- Products: Open WebUI
- CVE ids: CVE-2026-88001
- CVSS: 5

## Summary

Server-side fetch controls failed to evaluate redirect destinations, allowing authenticated users to reach internal or excluded hosts. This exposes the system to server-side request forgery attacks.

## What to do

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

## Latest updates

- 2026-09-09: CVE-2026-88001: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. (https://nvd.nist.gov/vuln/detail/CVE-2026-88001)
- 2026-09-09: CVE-2026-88001: Open WebUI: Server-side fetches reach blocked and internal hosts via unvalidated HTTP redirect targets (https://github.com/advisories/GHSA-5x7x-4c3c-qf5w)

## Sources

- 2026-09-09 GitHub Advisory Database: CVE-2026-88001: Open WebUI: Server-side fetches reach blocked and internal hosts via unvalidated HTTP redirect targets https://github.com/advisories/GHSA-5x7x-4c3c-qf5w
- 2026-09-09 NVD: CVE-2026-88001: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. https://nvd.nist.gov/vuln/detail/CVE-2026-88001

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