CVE-2026-42579

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.

Score
CVSS 3.1 9.1 Critical
Status
Modified - security-advisories@github.com
Published
2026-05-13
Last modified
2026-09-18
Weaknesses
CWE-1286, CWE-20, CWE-400, CWE-626

Affected products

References

 
 
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