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6.5 Medium

CVE-2026-42585 Netty is an asynchronous, event-driven network application framework

Description

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.

Affected products and versions

Product Affected versions Fixed in
netty 4.2 4.2.0.Alpha1 → < 4.2.13.Final 4.2.13.Final
netty 4.1 earliest → < 4.1.133.Final 4.1.133.Final
netty-codec-http 4.2 4.2.0.Alpha1 → < 4.2.13.Final 4.2.13.Final
netty-codec-http 4.1 earliest → < 4.1.133.Final 4.1.133.Final

References

Timeline

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