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.
Metrics
Affected Vendors & Products
Advisories
Source | ID | Title |
---|---|---|
![]() |
DLA-3947-1 | puma security update |
![]() |
EUVD-2024-0323 | 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. |
![]() |
GHSA-c2f4-cvqm-65w2 | Puma HTTP Request/Response Smuggling vulnerability |
![]() |
USN-6597-1 | Puma vulnerability |
![]() |
USN-6682-1 | Puma vulnerabilities |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Tue, 03 Jun 2025 15:15:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Metrics |
ssvc
|

Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2025-06-03T14:37:47.971Z
Reserved: 2023-12-29T16:10:20.366Z
Link: CVE-2024-21647

Updated: 2024-08-01T22:27:36.196Z

Status : Modified
Published: 2024-01-08T14:15:47.640
Modified: 2024-11-21T08:54:47.780
Link: CVE-2024-21647


No data.