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.

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Fixes

Solution

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Workaround

No workaround given by the vendor.

History

Fri, 02 Oct 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Thu, 01 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 01 Oct 2026 11:00:00 +0000

Type Values Removed Values Added
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.
Title Tornado before 6.5.9 StaticFileHandler Path Traversal via Symlink
First Time appeared Tornadoweb
Tornadoweb tornado
Weaknesses CWE-59
CPEs cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:*
Vendors & Products Tornadoweb
Tornadoweb tornado
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 8.2, '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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-01T19:29:47.547Z

Reserved: 2026-09-30T10:58:33.572Z

Link: CVE-2026-103263

cve-icon Vulnrichment

Updated: 2026-10-01T19:29:18.440Z

cve-icon NVD

Status : Deferred

Published: 2026-10-01T11:17:21.233

Modified: 2026-10-01T20:17:23.097

Link: CVE-2026-103263

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-01T10:42:05Z

Links: CVE-2026-103263 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-01T16:45:09Z

Weaknesses