CVE-2026-59221

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-22
• CWE-918

• https://github.com/open-webui/open-webui/commit/05098d25a58d03738e01c4e85e8852c3b4ad849cPatch
• https://github.com/open-webui/open-webui/pull/26050Issue Tracking, Patch
• https://github.com/open-webui/open-webui/releases/tag/v0.10.0Product, Release Notes
• https://github.com/open-webui/open-webui/security/advisories/GHSA-frvj-c5qp-xj4wExploit, Mitigation, Vendor Advisory
• https://github.com/open-webui/open-webui/security/advisories/GHSA-frvj-c5qp-xj4wExploit, Mitigation, Vendor Advisory

Published

Jul 9, 2026

Last Modified

Jul 10, 2026

Status

Analyzed

• One Click Account Takeover in GranolaHow a notification link broke out of Electron and led to a one-click account takeover.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-59216Open WebUI is an extensible, feature-rich, and user-friendly…9
• CVE-2026-59217Open WebUI is an extensible, feature-rich, and user-friendly…4.3
• CVE-2026-59218Open WebUI is an extensible, feature-rich, and user-friendly…5.3
• CVE-2026-59219Open WebUI is an extensible, feature-rich, and user-friendly…7.1
• CVE-2026-5922The IP phone might use malicious input stored in configurati…5.9
• CVE-2026-59220Open WebUI is an extensible, feature-rich, and user-friendly…6.5
• CVE-2026-59222Open WebUI is an extensible, feature-rich, and user-friendly…6.5
• CVE-2026-59223Open WebUI is an extensible, feature-rich, and user-friendly…4.3
• CVE-2026-59224Open WebUI is an extensible, feature-rich, and user-friendly…8
• CVE-2026-59225Open WebUI is an extensible, feature-rich, and user-friendly…6.3
• CVE-2026-59226Open WebUI is an extensible, feature-rich, and user-friendly…4.3
• CVE-2026-59227Open WebUI is an extensible, feature-rich, and user-friendly…5.4