VULNERABILITY INTELLIGENCE

CVE-2024-21647

CVSS score5.9 MEDIUM
EPSS probability0.96%
CISA KEVNot currently listed
Published2024-01-08
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

Puma is a web server for Ruby/Rack applications built for parallelism. Prior to version 6.4.2, puma exhibited incorrect behavior when parsing chunked transfer encoding bodies in a way that allowed HTTP request smuggling. Fixed versions limits the size of chunk extensions. Without this limit, an attacker could cause unbounded resource (CPU, network bandwidth) consumption. This vulnerability has been fixed in versions 6.4.2 and 5.6.8.

Weakness classification

  • security-advisories@github.com: CWE-444

Primary references