Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

Advisory record · GHSA-c2gf-v879-257j

netty-codec-http2: ByteBuf Reference-Count Leak in DelegatingDecompressorFrameListener Leads to Memory Exhaustion

CVSS 5.3 MediumEPSS 0.0075 · 55th percentile

Published by the GitHub Advisory Database at 11 Jun 2026, 13:28 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
io.netty:netty-codec-http2Maven<4.1.135.Final || >=4.2.0.Alpha1, <4.2.15.Final4.1.135.Final, 4.2.15.Final
Identifiers
GHSA-c2gf-v879-257j · CVE-2026-48043
Weakness (CWE)
CWE-400 · CWE-401 · CWE-772
Tags
Published
11 Jun 2026
Updated
6 Oct 2026

Machine-written summary

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

Netty's netty-codec-http2 package is vulnerable in versions before 4.1.135.Final and from 4.2.0.Alpha1 up to but not including 4.2.15.Final. A remote peer sending crafted HTTP/2 frames can trigger a ByteBuf reference-count leak in DelegatingDecompressorFrameListener, which can exhaust memory and potentially crash the JVM with an OutOfMemoryError. Upgrade to 4.1.135.Final or 4.2.15.Final. The source gives few details on the exact trigger.

Written 2 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
5.3 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0075, the 55th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:16 UTC First seen by agentprime
  2. 31 Oct 2026, 14:16 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.