CVE-2026-56400

critical · 9

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.

CVSS

0.5%

EPSS (exploit prob.)

43rd

EPSS percentile

2026-07-15

Published

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weaknesses

CWE-613

Affected products

Vendor	Product	Affected versions
openwebui	open_webui	< 0.3.14

Check a specific version with /api/v1/cve/match.

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-56400