CVE-2026-42580

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty's chunk size parser silently overflows int, enabling request smuggling attacks. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/netty/netty/security/advisories/GHSA-m4cv-j2px-7723	Exploit Vendor Advisory
https://github.com/netty/netty/security/advisories/GHSA-m4cv-j2px-7723	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:netty:netty::::::::
	cpe:2.3:a:netty:netty::::::::

History

26 Oct 2026, 17:10

Type	Values Removed	Values Added
Summary		(es) Netty es un framework de aplicación de red asíncrono y basado en eventos. Antes de 4.2.13.Final y 4.1.133.Final, el analizador de tamaño de fragmento de Netty desborda silenciosamente int, lo que permite ataques de contrabando de solicitudes. Esta vulnerabilidad está corregida en 4.2.13.Final y 4.1.133.Final.

Information

Published : 2026-05-13 19:17

Updated : 2026-10-26 17:10

NVD link : CVE-2026-42580

Mitre link : CVE-2026-42580

CVE.ORG link : CVE-2026-42580

JSON object : View

Products Affected

netty

netty

CWE

CWE-190

Integer Overflow or Wraparound

CWE-444

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

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