SB20260505105 - Server-Side Request Forgery (SSRF) in Open WebUI

Description

This security bulletin contains information about 1 vulnerability.

1) Server-Side Request Forgery (SSRF) (CVE-ID: N/A)

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

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote user to access internal services and disclose sensitive information.

The vulnerability exists due to server-side request forgery (SSRF) in /api/v1/retrieval/process/web when processing user-supplied URLs that follow location redirects. A remote user can supply a crafted URL that redirects to an internal destination to access internal services and disclose sensitive information.

Direct internal fetches are blocked, but the protection can be bypassed through a redirect response.

Remediation

Install update from vendor's website.

References

• https://github.com/open-webui/open-webui/security/advisories/GHSA-82r6-c5jm-f3mw
• https://github.com/open-webui/open-webui/pull/1862/files