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Advisory record · GHSA-cqgj-h8vf-4w59

Acknowledgement extension out of memory

CVSS 7.5 HighEPSS 0.0068 · 52nd percentile

Published by the GitHub Advisory Database at 10 Jun 2026, 16:46 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.cometd.java:cometd-java-server-commonMaven>=5.0.0, <5.0.23 || >=6.0.0, <6.0.19 || >=7.0.0, <7.0.19 || >=8.0.0, <8.0.95.0.23, 6.0.19, 7.0.19, 8.0.9
Identifiers
GHSA-cqgj-h8vf-4w59 · CVE-2025-53114
Weakness (CWE)
CWE-400
Tags
Published
10 Jun 2026
Updated
10 Jun 2026

Machine-written summary

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

The Maven package org.cometd.java:cometd-java-server-common, in versions 5.0.0 before 5.0.23, 6.0.0 before 6.0.19, 7.0.0 before 7.0.19, and 8.0.0 before 8.0.9, is affected. A client that repeatedly sends a fixed batch value while the server uses the acknowledgement extension can make the unacknowledged message queue grow without limit, causing an OutOfMemoryError and a server outage; the source does not say what authentication, if any, the client needs. Upgrade to 5.0.23, 6.0.19, 7.0.19, or 8.0.9, depending on your release line. If you cannot upgrade, disable the acknowledgement extension.

Written 3 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
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0068, the 52nd percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:20 UTC First seen by agentprime
  2. 31 Oct 2026, 14:20 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.