High severity7.5GHSA Advisory· Published May 13, 2026· Updated May 14, 2026

CVE-2026-42579

Description

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty's DNS codec does not enforce RFC 1035 domain name constraints during either encoding or decoding. This creates a bidirectional attack surface: malicious DNS responses can exploit the decoder, and user-influenced hostnames can exploit the encoder. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.

Affected products

Netty/NettyGHSA
Range: <= 4.1.132.Final

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

github.com/advisories/GHSA-cm33-6792-r9fmghsaADVISORY
github.com/netty/netty/security/advisories/GHSA-cm33-6792-r9fmnvd
nvd.nist.gov/vuln/detail/CVE-2026-42579ghsa
tools.ietf.org/html/rfc1035ghsa
tools.ietf.org/html/rfc1035ghsa

News mentions

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