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CVE-2026-56400

open-webui - Remote Code Execution via CORS Misconfiguration and Session Validation

Published: Jul 15, 2026Updated: Jul 16, 2026 Sources: CVE List NVDCWE-613
8.3HIGH
NVD MITRE
EPSS Score
0.3%
Top 72.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

open-webui before 0.3.14 contains a cross-origin resource sharing misconfiguration allowing arbitrary origins with allow_origins=* and authenticated requests to the /api/v1/functions endpoint. Attackers can execute arbitrary code on the openwebui instance by crafting malicious cross-site requests from attacker-controlled websites when an admin user visits them.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:RS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-613

Affected Products

open-webui
oss-projectaka open-webui/open-webui
open-webuiOn-premWeb App
AI / ML / ai-agent-tooling
openwebui
oss-projectaka open webui
open webuiOn-premWeb App
AI / ML / ai-agent-tooling

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Defense Evasion
Initial Access
View detailed technique mapping

References

https://github.com/open-webui/open-webui/security/advisories/GHSA-6xcp-7mpr-m7wm
github.com
https://www.vulncheck.com/advisories/open-webui-remote-code-execution-via-cors-misconfiguration-and-session-validation
vulncheck.com

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