CVE-2026-54017: Open WebUI terminal server proxy path traversal and SSRF

# CVE-2026-54017: Open WebUI terminal server proxy path traversal and SSRF

https://gcdradar.vercel.app/incidents/cve-2026-54017-open-webui-terminal-server-proxy-path-travers · AIR-2026-0768 · closed 2026-06-17

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-06-17
- AI role: Attack on AI
- Products: Open WebUI
- CVE ids: CVE-2026-54017
- CVSS: 7.7

## Summary

The terminal server reverse proxy in Open WebUI insufficiently confines user-controlled paths, permitting encoded traversal sequences that reach unintended endpoints. A vulnerability advisory has been published for the software.

## What to do

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

## Latest updates

- 2026-06-18: CVE-2026-54017: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. (https://nvd.nist.gov/vuln/detail/CVE-2026-54017)
- 2026-06-17: CVE-2026-54017: Open WebUI: Path traversal / SSRF in terminal server proxy via encoded path traversal (https://github.com/advisories/GHSA-r2wg-2mcr-66rv)

## Sources

- 2026-06-17 GitHub Advisory Database: CVE-2026-54017: Open WebUI: Path traversal / SSRF in terminal server proxy via encoded path traversal https://github.com/advisories/GHSA-r2wg-2mcr-66rv
- 2026-06-18 NVD: CVE-2026-54017: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. https://nvd.nist.gov/vuln/detail/CVE-2026-54017

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