Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openwebui | Open Webui | < 0.3.14 |
Related Weaknesses (CWE)
References
- https://github.com/open-webui/open-webui/security/advisories/GHSA-6xcp-7mpr-m7wmVendor Advisory
- https://www.vulncheck.com/advisories/open-webui-remote-code-execution-via-cors-mExploitThird Party Advisory
- https://github.com/open-webui/open-webui/security/advisories/GHSA-6xcp-7mpr-m7wmVendor Advisory
FAQ
What is CVE-2026-56400?
CVE-2026-56400 is a vulnerability with a CVSS score of 8.3 (HIGH). 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. Attacke...
How severe is CVE-2026-56400?
CVE-2026-56400 has been rated HIGH with a CVSS base score of 8.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-56400?
Check the references section above for vendor advisories and patch information. Affected products include: Openwebui Open Webui.