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High severity7.5NVD Advisory· Published Jul 29, 2026· Updated Aug 6, 2026

CVE-2026-59901

CVE-2026-59901

Description

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, the Bzip2Decoder handler in Netty's compression codec pipeline is vulnerable to a denial-of-service attack through a malformed bzip2 stream that permanently captures the event-loop thread in an infinite loop. The vulnerability exists in the run-length encoding (RLE) state machine within [Bzip2BlockDecompressor.read()]. This issue has been fixed in versions 4.1.136.Final and 4.2.16.Final.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
io.netty:netty-codec-compressionMaven
>= 4.2.0.Final, < 4.2.16.Final4.2.16.Final
io.netty:netty-codecMaven
< 4.1.136.Final4.1.136.Final

Affected products

247

Patches

Vulnerability mechanics

References

4

News mentions

0

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