{"cve":"CVE-2026-59221","nvd":{"published":"2026-07-09T18:16:55.613","modified":"2026-07-10T02:37:15.007","status":"Analyzed","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","score":7.7},"cwes":["CWE-22","CWE-918"],"references":["https://github.com/open-webui/open-webui/commit/05098d25a58d03738e01c4e85e8852c3b4ad849c","https://github.com/open-webui/open-webui/pull/26050","https://github.com/open-webui/open-webui/releases/tag/v0.10.0","https://github.com/open-webui/open-webui/security/advisories/GHSA-frvj-c5qp-xj4w","https://github.com/open-webui/open-webui/security/advisories/GHSA-frvj-c5qp-xj4w"],"products":["openwebui:open_webui"],"source":"nvd","synced_at":"2026-10-19T22:44:02.134301115+00:00"},"epss":{"cve":"CVE-2026-59221","score":0.00483,"percentile":0.41633,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-frvj-c5qp-xj4w","url":"https://osv.dev/vulnerability/GHSA-frvj-c5qp-xj4w","summary":"open-webui terminal proxy path traversal guard bypass via 9x encoded traversal","modified":"2026-08-04T14:40:44.875181031Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":[">=0.9.6 <0.10.0"],"fixed":["0.10.0"]}]},{"id":"PYSEC-2026-3597","url":"https://osv.dev/vulnerability/PYSEC-2026-3597","summary":"open-webui terminal proxy path traversal guard bypass via 9x encoded traversal","modified":"2026-08-04T14:30:28.719657938Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":[">=0.9.6 <0.10.0"],"fixed":["0.10.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}