CVE-2026-45338 | THREATINT

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.

PUBLISHED Reserved 2026-05-11 | Published 2026-05-15 | Updated 2026-05-15 | Assigner GitHub_M

HIGH: 7.7CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Problem types

CWE-918: Server-Side Request Forgery (SSRF)

Product status

< 0.9.0

affected

References

github.com/...-webui/security/advisories/GHSA-24c9-2m8q-qhmh exploit

github.com/...-webui/security/advisories/GHSA-24c9-2m8q-qhmh

cve.org (CVE-2026-45338)

nvd.nist.gov (CVE-2026-45338)

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