CVE-2026-59221 | THREATINT

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.

PUBLISHED Reserved 2026-07-02 | Published 2026-07-09 | Updated 2026-07-09 | Assigner GitHub_M

HIGH: 7.7CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Problem types

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE-918: Server-Side Request Forgery (SSRF)

Product status

>= 0.9.6, < 0.10.0

affected

References

github.com/...-webui/security/advisories/GHSA-frvj-c5qp-xj4w exploit

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

github.com/open-webui/open-webui/pull/26050

github.com/...ommit/05098d25a58d03738e01c4e85e8852c3b4ad849c

github.com/open-webui/open-webui/releases/tag/v0.10.0

cve.org (CVE-2026-59221)

nvd.nist.gov (CVE-2026-59221)

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