CVE-2026-42579CRITICAL 9.1EPSS p33.3%

CVE-2026-42579CVE-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.

Scoring

CVSS 3.19.1 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
EPSS0.42% probability of exploitation · percentile 33.3% · 2026-06-19T12:03:05Z
Published2026-05-13
Last modified2026-05-18

Underlying weaknesses· 3

CWE-20CWE-400CWE-626

References

  1. https://github.com/netty/netty/security/advisories/GHSA-cm33-6792-r9fm
  2. https://github.com/netty/netty/security/advisories/GHSA-cm33-6792-r9fm

3

TypeTargetConfidenceTier
WeaknessImproper Input Validationcwe-200%live
WeaknessUncontrolled Resource Consumptioncwe-4000%live
WeaknessNull Byte Interaction Error (Poison Null Byte)cwe-6260%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
CVE-2026-42581
CVE
CVE-2026-42584
CVE
CVE-2026-42011
CVE
CVE-2025-1673
CVE
CVE-2026-42507
CVE
CVE-2026-42000
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.