CVE-2026-123534

MediumCVSS 6.5/10Last modified Nov 9, 2026

Description

Tornado before 6.6 contains a path traversal vulnerability in RequestHandler.static_url() and get_version() that allows attackers to hash files outside static_path using ../ sequences. Attackers controlling input passed to static_url() can obtain SHA-512 hashes of readable files to confirm their existence, or reference /dev/zero to block the event loop indefinitely.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H

Weakness enumeration

CWE-22

Affected software

No affected versions have been published.

Timeline

Published: Nov 8, 2026
Last modified: Nov 9, 2026
NVD status: Deferred

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