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CVE-2026-59221open-webui terminal proxy path traversal guard bypass via 9x encoded traversal
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.
7.7 HIGHEPSS 0.48%Not in KEVNVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 7.7 | HIGH | 3.1GitHub_M (CNA) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
Details
- CVE ID
- CVE-2026-59221
- Status
- Analyzed
- Assigner (CNA)
- GitHub_M
- Published
- Jul 9, 2026
- Last modified
- 2026-07-10 02:37 UTC
Affected Products
As published by the CNA in the CVE record.
open-webuiopen-webui1 version range
- >= 0.9.6, < 0.10.0
References
- github.com https://github.com/open-webui/open-webui/commit/05098d25a58d03738e01c4e85e8852c3b4ad849c
- github.com https://github.com/open-webui/open-webui/pull/26050
- github.com https://github.com/open-webui/open-webui/releases/tag/v0.10.0
- github.com https://github.com/open-webui/open-webui/security/advisories/GHSA-frvj-c5qp-xj4w