Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openwebui | Open Webui | < 0.9.0 |
Related Weaknesses (CWE)
References
- https://github.com/open-webui/open-webui/security/advisories/GHSA-24c9-2m8q-qhmhExploitMitigationVendor Advisory
- https://github.com/open-webui/open-webui/security/advisories/GHSA-24c9-2m8q-qhmhExploitMitigationVendor Advisory
FAQ
What is CVE-2026-45338?
CVE-2026-45338 is a vulnerability with a CVSS score of 7.7 (HIGH). 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() i...
How severe is CVE-2026-45338?
CVE-2026-45338 has been rated HIGH with a CVSS base score of 7.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-45338?
Check the references section above for vendor advisories and patch information. Affected products include: Openwebui Open Webui.