high7.7
CVE-2026-59221
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | open-webui | >= 0.9.6, < 0.10.0 | 0.10.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Openwebui | Open Webui | Version 0.9.6 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-frvj-c5qp-xj4w
- https://github.com/open-webui/open-webui/security/advisories/GHSA-frvj-c5qp-xj4w
- https://nvd.nist.gov/vuln/detail/CVE-2026-59221
- https://github.com/open-webui/open-webui/pull/26050
- https://github.com/open-webui/open-webui/commit/05098d25a58d03738e01c4e85e8852c3b4ad849c
- https://github.com/open-webui/open-webui/releases/tag/v0.10.0