Vulnerability Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, the tool update endpoint (POST /api/v1/tools/id/{id}/update) is missing the workspace.tools permission check that is present on the tool create endpoint. This allows a user who has been explicitly denied tool management capabilities ( and who the administrator considers untrusted for code execution ) to replace a tool's server-side Python content and trigger execution, bypassing the intended workspace.tools security boundary. This vulnerability is fixed in 0.9.5.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openwebui | Open Webui | < 0.9.5 |
Related Weaknesses (CWE)
References
- https://github.com/open-webui/open-webui/security/advisories/GHSA-p4fx-23fq-jfg6ExploitMitigationVendor Advisory
- https://github.com/open-webui/open-webui/security/advisories/GHSA-p4fx-23fq-jfg6ExploitMitigationVendor Advisory
FAQ
What is CVE-2026-45395?
CVE-2026-45395 is a vulnerability with a CVSS score of 7.2 (HIGH). Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, the tool update endpoint (POST /api/v1/tools/id/{id}/update) is missing the workspace...
How severe is CVE-2026-45395?
CVE-2026-45395 has been rated HIGH with a CVSS base score of 7.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-45395?
Check the references section above for vendor advisories and patch information. Affected products include: Openwebui Open Webui.