CVE-2026-45400

Open WebUI: Server-Side Request Forgery (SSRF) bypass in `validate_url`

HIGH
8.5
CVSS Score
Published: May 15, 2026 at 08:40 PM UTC
Updated: June 17, 2026 at 10:52 AM UTC
1 product affected across 1 vendorOpen Webui

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Severity
HIGH8.5
Exploit prediction
EPSS 0.3%
SSVC
PoC

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, a parsing difference between the urlparse and requests libraries led to an SSRF bypass vulnerability. This vulnerability is fixed in 0.9.5.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 0.9.5
Affected range stops below 0.9.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

x_refsource_CONFIRMExploitVendor Advisory
Source: cverecord
https://github.com/open-webui/open-webui/security/advisories/GHSA-8w7q-q5jp-jvgx

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.5HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-918

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