CVE-2026-45338 Details
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.
A Server-Side Request Forgery (SSRF) vulnerability has been identified in Open WebUI versions prior to 0.9.0. The issue resides in the '_process_picture_url()' function within 'backend/open_webui/utils/oauth.py'. This function retrieves arbitrary URLs from OAuth picture claims without proper validation, allowing attackers to manipulate the server into making HTTP requests to internal resources and exfiltrating the full response. The vulnerability is present when 'ENABLE_OAUTH_SIGNUP' is enabled or 'OAUTH_UPDATE_PICTURE_ON_LOGIN' is set to true for existing users.
Users should update to Open WebUI version 0.9.0 or later, and apply 'validate_url()' before fetching URLs from OAuth picture claims to prevent SSRF vulnerabilities.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 15, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/open-webui/open-webui/security/advisories/GHSA-24c9-2m8q-qhmh | CISA-ADP | ExploitMitigationVendor Advisory |
| https://github.com/open-webui/open-webui/security/advisories/GHSA-24c9-2m8q-qhmh | [email protected] | ExploitMitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-918 | Server-Side Request Forgery (SSRF) | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| openwebui open webui | < 0.9.0 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 18, 2026 | Initial Analysis | [email protected] |
| May 15, 2026 | CVE Modified | CISA-ADP |
| May 15, 2026 | New CVE Received | [email protected] |