CVE-2026-45347

Open WebUI: Blind server side request forgery (SSRF) via the PDF generate function

State: Published
Severity: 4.3 Medium
Published: May 15, 2026
Updated: May 18, 2026
Reserved: May 11, 2026

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.5.11, there is a blind server side request forgery (SSRF) via the PDF generate function. In the PDF export, user inputs are interpreted as HTML and embedded into the PDF. According to tests, scripts and some potentially dangerous tags (iFrame, Object, etc.) are blocked, preventing server-side content from being read through this vulnerability. However, an image tag can be used to force a server-side request (SSRF), as shown in the following below. This vulnerability is fixed in 0.5.11.

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N	GitHub_M

Weaknesses

CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Product	Versions
open-webuiopen-webui	< 0.5.11Affected

References

https://github.com/open-webui/open-webui/security/advisories/GHSA-f776-fp4w-266c

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