SSRF in Open-Webui
CVE-2026-54018
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.004 (32.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.
Affected products
- Open-webui — versions < 0.9.6
- Openwebui Open_webui
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-54018?
- CVE-2026-54018 is a high-severity vulnerability in Open-Webui, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.7/10. Published 2026-06-23.
- How severe is CVE-2026-54018?
- High severity. CVSS v3 base score is 7.7 out of 10.