CVE-2026-42585

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty incorrectly parses malformed Transfer-Encoding, 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 LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/netty/netty/security/advisories/GHSA-38f8-5428-x5cv	Exploit Vendor Advisory
https://github.com/netty/netty/security/advisories/GHSA-38f8-5428-x5cv	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

18 May 2026, 12:24

Type	Values Removed	Values Added
First Time		Netty netty Netty
CPE		cpe:2.3:a:netty:netty::::::::
References	~~() https://github.com/netty/netty/security/advisories/GHSA-38f8-5428-x5cv -~~	() https://github.com/netty/netty/security/advisories/GHSA-38f8-5428-x5cv - Exploit, Vendor Advisory

15 May 2026, 21:16

Type	Values Removed	Values Added
References	~~() https://github.com/netty/netty/security/advisories/GHSA-38f8-5428-x5cv -~~	() https://github.com/netty/netty/security/advisories/GHSA-38f8-5428-x5cv -

13 May 2026, 19:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-13 19:17

Updated : 2026-05-18 12:24

NVD link : CVE-2026-42585

Mitre link : CVE-2026-42585

CVE.ORG link : CVE-2026-42585

JSON object : View

Products Affected

netty

netty

CWE

CWE-444

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

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