CVE-2026-45338

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, a Server-Side Request Forgery (SSRF) vulnerability exists in _process_picture_url() in backend/open_webui/utils/oauth.py (line ~1338). The function fetches arbitrary URLs from OAuth picture claims without applying validate_url(), allowing an attacker to force the server to make HTTP requests to internal resources and exfiltrate the full response. This vulnerability is fixed in 0.9.0.

Score

CVSS 3.1 7.7 High

Status

Analyzed - security-advisories@github.com

Published

2026-05-15

Last modified

2026-05-15

Weaknesses

CWE-918

Affected products

• Open-webui (Open-webui)
• Open Webui (Openwebui)

References

• https://github.com/open-webui/open-webui/security/advisories/GHSA-24c9-2m8q-qhmh