CVE-2026-59221

HIGH 7.7

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

CVSS Score

7.7

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-22 CWE-918
Vendor	open-webui
Product	open-webui
Published	Jul 9, 2026
Last Updated	Jul 9, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

open-webui / open-webui

>= 0.9.6, < 0.10.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/open-webui/open-webui/security/advisories/GHSA-frvj-c5qp-xj4w github.com: https://github.com/open-webui/open-webui/pull/26050 github.com: https://github.com/open-webui/open-webui/commit/05098d25a58d03738e01c4e85e8852c3b4ad849c github.com: https://github.com/open-webui/open-webui/releases/tag/v0.10.0