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NVD Vulnerability Details :
CVE-2026-42579
Modified
More InfoOfficial Page
Source-security-advisories@github.com
View Known Exploited Vulnerability (KEV) details
Published At-13 May, 2026 | 19:17
Updated At-18 May, 2026 | 17:16

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Primary3.19.1CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Type: Secondary
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
Type: Primary
Version: 3.1
Base score: 9.1
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CPE Matches
The Netty Project
netty
>>netty>>Versions before 4.1.133(exclusive)
cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*
The Netty Project
netty
>>netty>>Versions from 4.2.0(inclusive) to 4.2.13(exclusive)
cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-20Secondarysecurity-advisories@github.com
CWE-400Secondarysecurity-advisories@github.com
CWE-626Secondarysecurity-advisories@github.com
CWE ID: CWE-20
Type: Secondary
Source: security-advisories@github.com
CWE ID: CWE-400
Type: Secondary
Source: security-advisories@github.com
CWE ID: CWE-626
Type: Secondary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/netty/netty/security/advisories/GHSA-cm33-6792-r9fmsecurity-advisories@github.com
Exploit
Mitigation
Vendor Advisory
https://github.com/netty/netty/security/advisories/GHSA-cm33-6792-r9fm134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit
Mitigation
Vendor Advisory
Hyperlink: https://github.com/netty/netty/security/advisories/GHSA-cm33-6792-r9fm
Source: security-advisories@github.com
Resource:
Exploit
Mitigation
Vendor Advisory
Hyperlink: https://github.com/netty/netty/security/advisories/GHSA-cm33-6792-r9fm
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource:
Exploit
Mitigation
Vendor Advisory
Change History
0Changes found
Details not found