CVE-2026-54018

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, the SafePlaywrightURLLoader implements a validate_url function to prevent SSRF attacks by checking the IP address of the user-provided URL. However, this validation is performed only on the initial URL. Since Playwright automatically follows HTTP redirects (301/302) by default, an attacker can bypass the validation by providing a safe URL that redirects to a restricted internal network address (e.g., localhost, Docker container network, or Cloud Metadata). This allows the application to access internal services despite ENABLE_RAG_LOCAL_WEB_FETCH being set to False This vulnerability is fixed in 0.9.6.

Weakness classification

• CWE-918: Server-Side Request Forgery (SSRF)

Primary references

• security-advisories@github.com — Exploit, Vendor Advisory, Mitigation
• 134c704f-9b21-4f2e-91b3-4a467353bcc0 — Exploit, Vendor Advisory, Mitigation