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

No history.

Information

Published : 2026-05-13 19:17

Updated : 2026-06-17 10:48

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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