CVE-2026-45338: Open WebUI Vulnerable to SSRF via OAuth Profile Picture URL in _process_picture_url (oauth.py)

May 14, 2026 (updated May 19, 2026)

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.

References

github.com/advisories/GHSA-24c9-2m8q-qhmh
github.com/open-webui/open-webui/releases/tag/v0.9.0
github.com/open-webui/open-webui/security/advisories/GHSA-24c9-2m8q-qhmh
nvd.nist.gov/vuln/detail/CVE-2026-45338

Code Behaviors & Features

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