{"cve":"CVE-2026-103263","nvd":{"published":"2026-10-01T11:17:21.233","modified":"2026-10-01T20:17:23.097","status":"Deferred","description":"Tornado before 6.5.9 contains a path traversal vulnerability in StaticFileHandler that follows symbolic links inside the static root without confirming the resolved target stays within it. When a symlink pointing outside the static directory exists inside it, unauthenticated attackers can request it to read files such as configuration files, private keys, and application secrets accessible to the process user.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":8.2},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","score":5.9},"cwes":["CWE-59"],"references":["https://github.com/tornadoweb/tornado/commit/437ab5f76565403b3403438d2e555d11f8128d32","https://github.com/tornadoweb/tornado/security/advisories/GHSA-c2m8-h5v5-343r","https://www.vulncheck.com/advisories/tornado-before-6.5.9-staticfilehandler-path-traversal-via-symlink","https://github.com/tornadoweb/tornado/security/advisories/GHSA-c2m8-h5v5-343r"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:57:46.668721662+00:00"},"epss":{"cve":"CVE-2026-103263","score":0.00522,"percentile":0.44042,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-c2m8-h5v5-343r","url":"https://osv.dev/vulnerability/GHSA-c2m8-h5v5-343r","summary":"Tornado: StaticFileHandler follows symlinks outside static root (path traversal)","modified":"2026-10-02T03:56:10.964622908Z","packages":[{"ecosystem":"PyPI","name":"tornado","purl":"pkg:pypi/tornado","ranges":["<6.5.9"],"fixed":["6.5.9"]}]}],"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."]}