| Component | Open WebUI |
| Severity | high (CVSS 8.3) |
| CVSS vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H |
| Published (NVD) | 2026-07-15 |
| Last modified | 2026-07-16 |
| Affected versions | < 0.3.14 from the CVE Program record written by the CNA that assigned the CVE |
| Fixed in | 0.3.14 |
| Weakness | CWE-613 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade Open WebUI to
0.3.14or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-56400
- 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