CVE-2026-45400: Open WebUI SSRF Bypass in validate_url

# CVE-2026-45400: Open WebUI SSRF Bypass in validate_url

https://gcdradar.vercel.app/incidents/cve-2026-45400-open-webui-ssrf-bypass-in-validate-url · AIR-2026-0706 · closed 2026-05-14

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-05-14
- AI role: Attack on AI
- Products: Open WebUI
- CVE ids: CVE-2026-45400
- CVSS: 8.5

## Summary

A parsing discrepancy between urlparse and requests libraries in Open WebUI causes a Server-Side Request Forgery validation bypass. This allows attackers to bypass security restrictions on URL destinations.

## What to do

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

## Latest updates

- 2026-05-15: CVE-2026-45400: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. (https://nvd.nist.gov/vuln/detail/CVE-2026-45400)
- 2026-05-14: CVE-2026-45400: Open WebUI has a Server-Side Request Forgery (SSRF) bypass in `validate_url` (https://github.com/advisories/GHSA-8w7q-q5jp-jvgx)

## Sources

- 2026-05-14 GitHub Advisory Database: CVE-2026-45400: Open WebUI has a Server-Side Request Forgery (SSRF) bypass in `validate_url` https://github.com/advisories/GHSA-8w7q-q5jp-jvgx
- 2026-05-15 NVD: CVE-2026-45400: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. https://nvd.nist.gov/vuln/detail/CVE-2026-45400

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