Vulnerability · Published Jun 30, 2026 · Assigned by VulnCheck
CVE-2026-56399Open WebUI - Server-Side Request Forgery via Location Redirect in /api/v1/retrieval/process/web
Medium 5.0
In plain English
A medium-severity server-side request forgery in open-webui from open-webui. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).
Severity (CVSS 3.1)5.0Medium
Exploit odds (30 days)0.5%top 60.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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 redirect headers to access internal services and potentially execute commands via instance secrets.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| open-webui | open-webui | 0 – before 0.6.27 |
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N