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High severity7.5NVD Advisory· Published Jun 12, 2026· Updated Jun 15, 2026

CVE-2026-44893

CVE-2026-44893

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.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
io.netty:netty-codec-haproxyMaven
>= 4.2.0.Final, < 4.2.15.Final4.2.15.Final
io.netty:netty-codec-haproxyMaven
< 4.1.135.Final4.1.135.Final

Affected products

82

Patches

Vulnerability mechanics

References

5

News mentions

0

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