CVE-2026-56400
HIGHopen-webui - Remote Code Execution via CORS Misconfiguration and Session Validation
Title source: cnaDescription
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.
References (2)
Core 2
Core References
Vendor Advisory vendor-advisory
GitHub Security Advisory (GHSA-6xcp-7mpr-m7wm)
https://github.com/open-webui/open-webui/security/advisories/GHSA-6xcp-7mpr-m7wm
Third Party Advisory third-party-advisory
VulnCheck Advisory: open-webui - Remote Code Execution via CORS Misconfiguration and Session Validation
https://www.vulncheck.com/advisories/open-webui-remote-code-execution-via-cors-misconfiguration-and-session-validation
Scores
CVSS v3
8.3
EPSS
0.0035
EPSS Percentile
27.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
total
Details
CWE
CWE-613
Status
published
Products (3)
open-webui/open-webui
< 0.3.14
open-webui/open-webui
0.3.14
openwebui/open_webui
< 0.3.14
Published
Jul 15, 2026
Tracked Since
Jul 15, 2026