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Advisory record · GHSA-hh82-3pmq-7frp

Netty vulnerable to HTTP Response splitting from assigning header value iterator

CVSS 6.5 MediumEPSS 0.0095 · 61st percentile

Published by the GitHub Advisory Database at 12 Dec 2022, 21:25 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
io.netty:netty-codec-httpMaven>=4.1.83.Final, <4.1.86.Final4.1.86.Final
Identifiers
GHSA-hh82-3pmq-7frp · CVE-2022-41915
Weakness (CWE)
CWE-113 · CWE-436
Tags
Published
12 Dec 2022
Updated
28 Jan 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Netty's netty-codec-http package, versions 4.1.83.Final through before 4.1.86.Final, does not validate header values passed to DefaultHttpHeaders.set as an iterator of values. An attacker who can supply those header values can perform HTTP response splitting. Upgrade to netty-codec-http 4.1.86.Final or later. As a workaround, replace set calls that take an iterator with a remove call followed by add calls in a loop over the values.

Written 7 Nov 2026.

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
6.5 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0095, the 61st percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:09 UTC First seen by agentprime
  2. 31 Oct 2026, 15:09 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.