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CVE-2026-123534 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.x Severity and Vector Strings:

VolerionCVSS-B:5.9 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CNA: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/tornadoweb/tornado/security/advisories/GHSA-v8g8-cp5j-42fg	[email protected]	AdvisoryRemedyVendor
https://www.vulncheck.com/advisories/tornado-before-6.6-path-traversal-via-static-url-version-hashing	[email protected]	AdvisoryRemedy

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-22	Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')	[email protected]

Affected Products

Product	Versions
Tornado	< 6.6
CPE cpe:2.3:a:tornadoweb:tornado:::::::: Remediation Upgrade: 6.6.0moderate effort Workaround:low effort Validate or allowlist any path passed to static_url(), or avoid passing request-derived values to it.

Change History

1 change record found show changes