CVE-2026-123534

EUVD-2026-119419
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.
Path Traversal
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
6.5 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 27.36%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources (CNA/ADP records, vendor advisories, Enginsight analysis).
VendorProductVersionSource
tornadowebtornado
𝑥
< 6.6
CNA
Debian logo
Debian Releases
Debian Product
Codename
python-tornado
bookworm
vulnerable
bookworm (security)
vulnerable
forky
vulnerable
sid
6.6.0-1
fixed
trixie
vulnerable
trixie (security)
vulnerable
Common Weakness Enumeration
References
https://github.com/tornadoweb/tornado/security/advisories/GHSA-v8g8-cp5j-42fg
https://www.vulncheck.com/advisories/tornado-before-6.6-path-traversal-via-static-url-version-hashing