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OpenAdvisories
High · 7.7 CVE-2026-59221 EUVD-2026-42650GHSA-frvj-c5qp-xj4wPYSEC-2026-3597

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

Published Jul 9, 2026 · Updated Jul 9, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
open-webui open-webui >= 0.9.6, < 0.10.0 —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI open-webui >= 0.9.6, < 0.10.0 0.10.0 GHSA-frvj-c5qp-xj4w

References