What is CVE-2026-56399?

CVE-2026-56399 is a medium-severity vulnerability in Open-webui, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.0/10. Published 2026-06-30.

How severe is CVE-2026-56399?

Medium severity. CVSS v3 base score is 5.0 out of 10.

SSRF in Open-webui

CVE-2026-56399

Open WebUI before 0.6.27 contains a server-side request forgery vulnerability in the /api/v1/retrieval/process/web endpoint that allows authenticated users to bypass SSRF protections. Attackers can manipulate URL parameters with location r…

Vulnerability class: SSRF (Server-Side Request Forgery)

CVSS v3 metric

CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N.

Affected products

Open-webui — versions 0, 0.6.27

Weakness classification (CWE)

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

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-56399?: CVE-2026-56399 is a medium-severity vulnerability in Open-webui, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.0/10. Published 2026-06-30.
How severe is CVE-2026-56399?: Medium severity. CVSS v3 base score is 5.0 out of 10.