Vulnerability Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 before 0.10.0, _sanitize_proxy_path in backend/open_webui/routers/terminals.py decoded proxy paths only eight times, allowing a nine-times percent-encoded ../ traversal value to pass normalization checks and be decoded by the upstream terminal server. This issue is fixed in version 0.10.0.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openwebui | Open Webui | 0.9.6 |
Related Weaknesses (CWE)
References
- https://github.com/open-webui/open-webui/commit/05098d25a58d03738e01c4e85e8852c3Patch
- https://github.com/open-webui/open-webui/pull/26050Issue TrackingPatch
- https://github.com/open-webui/open-webui/releases/tag/v0.10.0ProductRelease Notes
- https://github.com/open-webui/open-webui/security/advisories/GHSA-frvj-c5qp-xj4wExploitMitigationVendor Advisory
- https://github.com/open-webui/open-webui/security/advisories/GHSA-frvj-c5qp-xj4wExploitMitigationVendor Advisory
FAQ
What is CVE-2026-59221?
CVE-2026-59221 is a vulnerability with a CVSS score of 7.7 (HIGH). Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 before 0.10.0, _sanitize_proxy_path in backend/open_webui/routers/terminals.py decoded proxy paths only...
How severe is CVE-2026-59221?
CVE-2026-59221 has been rated HIGH with a CVSS base score of 7.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-59221?
Check the references section above for vendor advisories and patch information. Affected products include: Openwebui Open Webui.