CVE-2026-56400
open-webui - Remote Code Execution via CORS Misconfiguration and Session Validation
CVSS Score
8.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-613 |
| Vendor | open-webui |
| Product | open-webui |
| Published | Jul 15, 2026 |
| Last Updated | Jul 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
open-webui / open-webui
0 < 0.3.14