Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.132.Final and 4.2.10.Final, Netty incorrectly parses quoted strings in HTTP/1.1 chunked transfer encoding extension values, enabling request smuggling attacks. Versions 4.1.132.Final and 4.2.10.Final fix the issue.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 2
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Netty Netty
cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*
|
— |
4.1.132
|
|
Netty Netty
cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*
|
4.2.0
|
4.2.10
|
References 4
https://github.com/netty/netty/security/advisories/GHSA-pwqr-wmgm-9rr8
security-advisories@github.com
https://w4ke.info/2025/06/18/funky-chunks.html
security-advisories@github.com
https://w4ke.info/2025/10/29/funky-chunks-2.html
security-advisories@github.com
https://www.rfc-editor.org/rfc/rfc9110
security-advisories@github.com