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Advisory record · GHSA-6h4f-pj3g-q8fq

Undertow OutOfMemory when parsing form data encoding with application/x-www-form-urlencoded

CVSS 7.5 HighEPSS 0.015 · 73rd percentile

Published by the GitHub Advisory Database at 3 Dec 2025, 21:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
io.undertow:undertow-coreMaven<2.2.39.Final || >=2.4.0.Alpha1, <2.4.0.Beta1 || >=2.3.0.Alpha1, <2.3.21.Final2.2.39.Final, 2.4.0.Beta1, 2.3.21.Final
Identifiers
GHSA-6h4f-pj3g-q8fq · CVE-2024-3884
Weakness (CWE)
CWE-20
Tags
Published
3 Dec 2025
Updated
10 Sept 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
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.015, the 73rd percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 3 Dec 2025, 18:40 UTC Confirmed by the CVE List
  2. 3 Dec 2025, 19:15 UTC Confirmed by NVD
  3. 31 Oct 2026, 14:17 UTC First seen by agentprime
  4. 31 Oct 2026, 14:17 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.