Server-Side Request Forgery (SSRF) in Open WebUI - #VU130939
Published: May 11, 2026
Vulnerability identifier: #VU130939
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Open WebUI
Affected software:
Open WebUI
Open WebUI
Detailed vulnerability description
The vulnerability allows a remote user to disclose sensitive information from internal resources.
The vulnerability exists due to server-side request forgery (SSRF) in _process_picture_url() in backend/open_webui/utils/oauth.py when processing OAuth picture claims. A remote user can supply a crafted picture URL to disclose sensitive information from internal resources.
Exploitation requires OAuth to be configured with ENABLE_OAUTH_SIGNUP=true or OAUTH_UPDATE_PICTURE_ON_LOGIN=true.
Remediation
Install security update from vendor's website.