Server-side Request Forgery (SSRF) Affecting open-webui package, versions [0.3.31 ,0.9.5)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PYTHON-OPENWEBUI-16755281
- published19 May 2026
- disclosed14 May 2026
- creditFushuling, RacerZ-fighting
Introduced: 14 May 2026
NewCVE-2026-45400 (opens in a new tab)How to fix?
Upgrade open-webui to version 0.9.5 or higher.
Overview
open-webui is an Open WebUI
Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) through the validate_url function in the URL parsing and request-routing path. An attacker can reach internal or loopback targets by supplying a URL containing a backslash, tab, carriage return, or line feed, causing urllib.parse.urlparse and the HTTP client to interpret the host differently. This lets a URL pass host-based filtering while the outbound request is sent to a different destination, exposing internal services and defeating private-IP allowlists.