CVE-2026-59221

open-webui terminal proxy path traversal guard bypass via 9x encoded traversal

CVSS 7.7 HIGHEPSS 0.4%CWE-22 CWE-918

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.7EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

09 Jul 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Affected products

open-webui · open-webui

References

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 https://github.com/open-webui/open-webui/security/advisories/GHSA-frvj-c5qp-xj4w