Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

Advisory record · GHSA-6v25-8wq6-xq4j

Hazelcast allows arbitrary member memory access by low-privileged client

CVSS 9.3 CriticalCriticalEPSS 0.0038 · 32nd percentile

Critical, because:

  • CVSS score 9.3: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 8 Oct 2026, 22:10 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
com.hazelcast:hazelcastMaven>=5.6.0, <5.7.0 || >=5.5.0, <5.7.0 || <5.7.05.7.0
Identifiers
GHSA-6v25-8wq6-xq4j · CVE-2026-107726
Weakness (CWE)
CWE-20
Tags
Published
8 Oct 2026
Updated
8 Oct 2026

Machine-written summary

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

Hazelcast (Maven package com.hazelcast:hazelcast) versions before 5.7.0 are affected. A low-privileged malicious client can read arbitrary memory from cluster members and may crash members, or in some Enterprise Edition configurations corrupt memory, potentially leading to remote code execution. Upgrade to 5.7.0, or for Enterprise Edition, to 5.6.1, 5.5.10, or 5.4.5; restrict cluster access to trusted clients only if an upgrade cannot be applied immediately.

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
9.3 Critical 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0038, the 32nd percentile, on 5 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.