VULNERABILITY INTELLIGENCE

CVE-2024-52804

CVSS score7.5 HIGH
EPSS probability1.04%
CISA KEVNot currently listed
Published2024-11-22
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

Tornado is a Python web framework and asynchronous networking library. The algorithm used for parsing HTTP cookies in Tornado versions prior to 6.4.2 sometimes has quadratic complexity, leading to excessive CPU consumption when parsing maliciously-crafted cookie headers. This parsing occurs in the event loop thread and may block the processing of other requests. Version 6.4.2 fixes the issue.

Weakness classification

  • security-advisories@github.com: CWE-400

Primary references