CVE-2026-87013: Open WebUI Folder Loop Denial of Service Vulnerability

# CVE-2026-87013: Open WebUI Folder Loop Denial of Service Vulnerability

https://gcdradar.vercel.app/incidents/cve-2026-87013-open-webui-folder-loop-denial-of-service-vuln · AIR-2026-0908 · closed 2026-09-09

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-09-09 (happened 2026-09-10)
- AI role: Attack on AI
- Products: Open WebUI
- CVE ids: CVE-2026-87013
- CVSS: 4.3

## Summary

An input validation flaw in Open WebUI allows authenticated users to create folder loops resulting in non-terminating requests. A patch has been issued to fix the re-parent endpoint checks.

## What to do

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

## Latest updates

- 2026-09-10: CVE-2026-87013: Open WebUI: Any authenticated user can start a non-terminating request via a folder parent cycle (https://github.com/advisories/GHSA-8r35-5x5r-hv74)
- 2026-09-09: CVE-2026-87013: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. (https://nvd.nist.gov/vuln/detail/CVE-2026-87013)

## Sources

- 2026-09-09 NVD: CVE-2026-87013: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. https://nvd.nist.gov/vuln/detail/CVE-2026-87013
- 2026-09-10 GitHub Advisory Database: CVE-2026-87013: Open WebUI: Any authenticated user can start a non-terminating request via a folder parent cycle https://github.com/advisories/GHSA-8r35-5x5r-hv74

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