CVE-2026-42579Disclosure(netty / netty)

LOWCVSS 9.1 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

0.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-20CWE-400CWE-626CWE-1286

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • netty

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • 1 total mentions across 1 day

Affected systems

Vendors
Products
netty

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-05-13: 1Technical Details · 2026-05-13: 105-13
Signal classification1 categories
Disclosure
1100.0%
Referenced assets2 URLs
By indicator
Full discourse1 post
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-42579 DNS Codec RFC 1035 Constraint Bypass in Netty Before http://4.2.13.Final https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-42579

    Post summary

    The text announces CVE-2026-42579, a DNS Codec RFC 1035 constraint bypass in Netty before version 4.2.13.Final, but does not provide any PoC, exploit, active exploitation, or patch details.

    0000046
    4.0K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appnettynetty---

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