| Component | Open WebUI |
| Severity | high (CVSS 7.7) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
| Published (NVD) | 2026-07-09 |
| Last modified | 2026-07-10 |
| Affected versions | open_webui = 0.9.6 |
| Fixed in | see the vendor advisory |
| Weakness | CWE-22CWE-918 |
| CISA KEV | not listed |
NVD 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.
What to do
- NVD lists no fixed version yet: follow the vendor advisory below and keep Open WebUI off the public internet until a fix ships.
- Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-59221
- https://github.com/open-webui/open-webui/security/advisories/GHSA-frvj-c5qp-xj4w
- https://github.com/open-webui/open-webui/commit/05098d25a58d03738e01c4e85e8852c3b4ad849c
- https://github.com/open-webui/open-webui/pull/26050
- https://github.com/open-webui/open-webui/releases/tag/v0.10.0
Read more
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