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CVE Vulnerability Details :
CVE-2026-42579
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-13 May, 2026 | 18:01
Updated At-18 May, 2026 | 15:40
Rejected At-
▼CVE Numbering Authority (CNA)
Netty: DNS Codec Input Validation Bypass in Netty (Encoder + Decoder)

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
Vendor
The Netty Projectnetty
Product
netty
Versions
Affected
  • >= 4.2.0.Alpha1, < 4.2.13.Final
  • < 4.1.133.Final
Problem Types
TypeCWE IDDescription
CWECWE-20CWE-20: Improper Input Validation
CWECWE-400CWE-400: Uncontrolled Resource Consumption
CWECWE-626CWE-626: Null Byte Interaction Error (Poison Null Byte)
Type: CWE
CWE ID: CWE-20
Description: CWE-20: Improper Input Validation
Type: CWE
CWE ID: CWE-400
Description: CWE-400: Uncontrolled Resource Consumption
Type: CWE
CWE ID: CWE-626
Description: CWE-626: Null Byte Interaction Error (Poison Null Byte)
Metrics
VersionBase scoreBase severityVector
3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/netty/netty/security/advisories/GHSA-cm33-6792-r9fm
x_refsource_CONFIRM
Hyperlink: https://github.com/netty/netty/security/advisories/GHSA-cm33-6792-r9fm
Resource:
x_refsource_CONFIRM
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/netty/netty/security/advisories/GHSA-cm33-6792-r9fm
exploit
Hyperlink: https://github.com/netty/netty/security/advisories/GHSA-cm33-6792-r9fm
Resource:
exploit
Details not found