CVE WatchJul 15, 2026

CVE-2026-44893

Netty is a network application framework for development of protocol servers and clients. In netty-codec-haproxy prior to versions 4.1.135.F

CVSS

7.5

High

EPSS

0.6%

p44

KEV

—

Exploit Today

0-100

Published: Jun 12, 2026 · Last modified: Jul 15, 2026 · CWE-703 · CWE-805

EPSS · 30d

0.6%EPSS · 30 days0.6%

2026-06-302026-07-16

Technical description

Netty is a network application framework for development of protocol servers and clients. In netty-codec-haproxy prior to versions 4.1.135.Final and 4.2.15.Final, when decoding a PP2_TYPE_SSL TLV, HAProxyMessage.readNextTLV() first calls `header.retainedSlice(header.readerIndex(), length)` and only then reads the 1-byte client field and 4-byte verify field. If the attacker sets the TLV length below 5, the subsequent readByte/readInt throws IndexOutOfBoundsException. HAProxyMessageDecoder only catches HAProxyProtocolException around this call, so the IOOBE propagates and the retained slice on the pooled cumulation buffer is never released. Versions 4.1.135.Final and 4.2.15.Final patch the issue.

Official references

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