high · CVSS v3 6.5 · CVSS v4 8.3

CVE-2026-123534

Tornado before 6.6 contains a path traversal vulnerability in RequestHandler.static_url() and get_version() that allows …

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.

Scores

Severity
high
CVSS v2
6.1
CVSS v3
6.5
CVSS v4
8.3
EPSS
—

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