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CVE-2026-42579: Netty: DNS Codec Input Validation Bypass in Netty (Encoder + Decoder)

High · CVSS 7.5 (CVSS 3.1)EPSS 1.0%, 63th percentilePublished Updated Assigner: GitHub_M

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.

Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N · CWE-20, CWE-400, CWE-626

Tracked companies

Confluence

Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.

Status incidents that name it

No tracked status incident names this CVE.

Affected vendors and products

netty: nettyRed Hat: Red Hat build of Apache Camel 4.18.1.P1 for Spring Boot 3.5.16Red Hat: Red Hat build of Apache Camel 4 for Quarkus 3Red Hat: Red Hat build of Apicurio Registry 3Red Hat: Red Hat build of Debezium 3Red Hat: Red Hat Build of KeycloakRed Hat: Red Hat Data Grid 8Red Hat: Red Hat Enterprise Linux AI (RHEL AI) 3Red Hat: Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7Red Hat: Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8Red Hat: Red Hat JBoss Enterprise Application Platform 8.1.7.GARed Hat: Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat: Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat: Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat: streams for Apache Kafka 2Red Hat: Streams for Apache Kafka 3.2.1

References

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