CVE-2026-59221

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

State: Published
Severity: 7.7 High
Published: Jul 9, 2026
Updated: Jul 9, 2026
Reserved: Jul 2, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.7 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N	GitHub_M

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Product	Versions
open-webuiopen-webui	>= 0.9.6, < 0.10.0Affected

References

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