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CVE-2026-59221

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

Description (CNA)

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 (CNA)

Vendor / productVersions
open-webui / open-webuiaffected >= 0.9.6, < 0.10.0

CWE

CWE-22, CWE-918

References

ADP enrichment

CISA-ADP

No English description supplied.