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Advisory record · GHSA-cqqj-4p63-rrmm

HTTP Request Smuggling in Netty

CVSS 9.1 CriticalCriticalEPSS 0.089 · 95th percentile

Critical, because:

  • CVSS score 9.1: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 21 Feb 2020, 18:55 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
io.netty:netty-codec-httpMaven<4.1.444.1.44
org.jboss.netty:nettyMavenall versionsNo fixed version yet
io.netty:nettyMavenall versionsNo fixed version yet
Identifiers
GHSA-cqqj-4p63-rrmm · CVE-2019-20444
Weakness (CWE)
CWE-444
Tags
Published
21 Feb 2020
Updated
2 Jul 2025

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.1 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.089, the 95th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:10 UTC First seen by agentprime
  2. 31 Oct 2026, 15:10 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.