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Vulnerability record · CVE-2026-59221 · published 9 July 2026

CVE-2026-59221: Openwebui open webui path traversal vulnerability

Openwebui · Open Webui

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.

7.7 CVSS 3.1 High EPSS 0.48% · top 60.8% CWE-22 · Path traversalCWE-918 · Server-side request forgery (SSRF)
7.7CVSS 3.1 base score
0.48%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References, 2 tagged exploit
10 Jul 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/open-webui/open-webui/commit/05098d25a58d03738e01c4e85e8852c3b4ad849c Patch
https://github.com/open-webui/open-webui/pull/26050 Issue TrackingPatch
https://github.com/open-webui/open-webui/releases/tag/v0.10.0 ProductRelease Notes
https://github.com/open-webui/open-webui/security/advisories/GHSA-frvj-c5qp-xj4w ExploitMitigationVendor Advisory
https://github.com/open-webui/open-webui/security/advisories/GHSA-frvj-c5qp-xj4w ExploitMitigationVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-59221), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.