maven package report

Is io.netty:netty-codec-haproxy safe?

5 known vulnerabilities, worst severity HIGH.

cvss
8.7

how bad it is if exploited, out of 10

epss
0.60%

chance of exploitation in the next 30 days

xyz score
3.4

CyberXYZ composite, out of 10

fig. 01 — GHSA-q6cq-mhr2-jmr5, the advisory selected below

// advisories

GHSA-q6cq-mhr2-jmr5

HIGHCVE-2026-55851

The HAProxyMessageDecoder in netty's codec-haproxy module performs protocol version detection by reading the 13th byte of the inbound stream as a signed Java byte and widening it to int without masking. When an attacker sends a PROXY protocol v2 binary prefix (0D 0A 0D 0A 00 0D 0A 51 55 49 54 0A) followed by version byte 0xFF, the sign extension produces -1, which collides with the decoder's "need

Affected
>= 4.2.0.Final, <= 4.2.15.Final
Fixed in
4.2.16.Final
Weakness
CWE-400
Published
2026-07-22
Source
github

GHSANVDMITREreferencereferencereferencereferencereference

// dependencies

0 direct

Sign in for dependency paths and remediation

// ai model usage

Tracked for PyPI packages. HuggingFace models declare Python dependencies, so maven packages are not covered.

Checked 2026-09-22 at 02:54 UTC. The most recent advisory here was published 2026-07-22. Updated continuously from NVD, GHSA, OSV and CNA feeds.

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Is io.netty:netty-codec-haproxy safe? maven package security report | CyberXYZ