CVE-2026-123534

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.

Referanslar

• 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