CVE-2026-45338

HIGH

Open WebUI: SSRF via OAuth Profile Picture URL in _process_picture_url (oauth.py)

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 7.7
EPSS 0.0001
EPSS Percentile 1.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-918
Status published
Products (3)
open-webui/open-webui < 0.9.0
openwebui/open_webui < 0.9.0
pypi/open-webui 0 - 0.9.0PyPI
Published May 15, 2026
Tracked Since May 16, 2026