GHSA-6v25-8wq6-xq4j

Suggest an improvement
Source
https://github.com/advisories/GHSA-6v25-8wq6-xq4j
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-6v25-8wq6-xq4j/GHSA-6v25-8wq6-xq4j.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-6v25-8wq6-xq4j
Aliases
  • CVE-2026-107726
Published
2026-10-08T22:10:29Z
Modified
2026-10-08T22:30:20Z
Severity
  • 9.3 (Critical) CVSS_V4 - 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 CVSS Calculator
Summary
Hazelcast allows arbitrary member memory access by low-privileged client
Details

Impact

A flaw has been found in Hazelcast Enterprise Edition and Community Edition, which would allow a low-privileged malicious client to read arbitrary data in memory from any cluster member (including Java heap memory, off-heap data, and JVM process address space). Additionally, such a client may be able to cause one or more cluster members to crash, or in some Enterprise Edition configurations also corrupt memory contents, potentially leading to remote code execution. Both slim and full distributions are affected.

Patches

Enterprise customers should upgrade to a fixed version of Hazelcast Enterprise Edition:

  • 5.7.0
  • 5.6.1
  • 5.5.10
  • 5.4.5

Customers with extended support contracts should contact Hazelcast Support for information on patches for older versions.

Community Edition users should upgrade to version 5.7.0.

Hazelcast also recommends all customers follow the advice in our Security Hardening guide, including:

Workarounds

If you cannot update to a fixed version immediately, restrict cluster access to trusted clients only and ensure clients are hardened against compromise.

References

Security Advisory on the Hazelcast Support Portal

Database specific 
{
    "cwe_ids": [
        "CWE-20"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-08T22:10:29Z",
    "nvd_published_at": null,
    "severity": "CRITICAL"
}
References

Affected packages

Maven / com.hazelcast:hazelcast

Package

Name
com.hazelcast:hazelcast
View open source insights on deps.dev
Purl
pkg:maven/com.hazelcast/hazelcast

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.6.0
Fixed
5.7.0

Affected versions

5.*
5.6.0

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-6v25-8wq6-xq4j/GHSA-6v25-8wq6-xq4j.json"

Maven / com.hazelcast:hazelcast

Package

Name
com.hazelcast:hazelcast
View open source insights on deps.dev
Purl
pkg:maven/com.hazelcast/hazelcast

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.5.0
Fixed
5.7.0

Affected versions

5.*
5.5.0
5.6.0-BETA-1
5.6.0

Database specific

last_known_affected_version_range 
"< 5.5.10"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-6v25-8wq6-xq4j/GHSA-6v25-8wq6-xq4j.json"

Maven / com.hazelcast:hazelcast

Package

Name
com.hazelcast:hazelcast
View open source insights on deps.dev
Purl
pkg:maven/com.hazelcast/hazelcast

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.7.0

Affected versions

1.*
1.5
1.5.1
1.5.2
1.5.3
1.6-RC1
1.6
1.7-RC1
1.7-RC2
1.7-RC3
1.7-RC4
1.7
1.7.1
1.8
1.8.1
1.8.2
1.8.3
1.8.4
1.8.5
1.9
1.9.1-RC2
1.9.1
1.9.2
1.9.2.1
1.9.2.2
1.9.2.3
1.9.3-RC
1.9.3
1.9.3.1
1.9.3.2
1.9.3.3
1.9.3.4
1.9.4-RC
1.9.4-RC1
1.9.4
1.9.4.1
1.9.4.2
1.9.4.3
1.9.4.4
1.9.4.5
1.9.4.6
1.9.4.8
2.*
2.0-RC1
2.0-RC2
2.0
2.0.1
2.0.2
2.0.3
2.0.4
2.1
2.1.1
2.1.2
2.1.3
2.2
2.3
2.3.1
2.4
2.4.1
2.5
2.5.1
2.6
2.6.1
2.6.2
2.6.3
2.6.4
2.6.5
2.6.6
2.6.7
2.6.8
2.6.9
2.6.10
3.*
3.0-RC1
3.0-RC2
3.0
3.0.1
3.0.2
3.0.3
3.1
3.1.1
3.1.2
3.1.3
3.1.4
3.1.5
3.1.6
3.1.7
3.1.8
3.1.9
3.2-RC1
3.2-RC2
3.2
3.2.1
3.2.2
3.2.3
3.2.4
3.2.5
3.2.6
3.2.7
3.3-RC1
3.3-RC2
3.3-RC3
3.3
3.3-EA
3.3-EA2
3.3.1
3.3.2
3.3.3
3.3.4
3.3.5
3.4
3.4-EA
3.4.1
3.4.2
3.4.3
3.4.4
3.4.5
3.4.6
3.4.7
3.4.8
3.5
3.5-EA
3.5.1
3.5.2
3.5.3
3.5.4
3.5.5
3.6-RC1
3.6
3.6-EA
3.6-EA2
3.6-EA3
3.6.1
3.6.2
3.6.3
3.6.4
3.6.5
3.6.6
3.6.7
3.6.8
3.7
3.7-EA
3.7.1
3.7.2
3.7.3
3.7.4
3.7.5
3.7.6
3.7.7
3.7.8
3.8-RC1
3.8
3.8-EA
3.8.1
3.8.2
3.8.3
3.8.4
3.8.5
3.8.6
3.8.7
3.8.8
3.8.9
3.9
3.9-EA
3.9.1
3.9.2
3.9.3
3.9.4
3.10-BETA-1
3.10-BETA-2
3.10
3.10.1
3.10.2
3.10.3
3.10.4
3.10.5
3.10.6
3.10.7
3.11-BETA-1
3.11
3.11.1
3.11.2
3.11.3
3.11.4
3.11.5
3.11.6
3.11.7
3.12-BETA-1
3.12-BETA-2
3.12
3.12.1
3.12.2
3.12.3
3.12.4
3.12.5
3.12.6
3.12.7
3.12.8
3.12.9
3.12.10
3.12.11
3.12.12
3.12.13
4.*
4.0-BETA-1
4.0-BETA-2
4.0
4.0.1
4.0.2
4.0.3
4.0.4
4.0.5
4.0.6
4.1-BETA-1
4.1
4.1.1
4.1.2
4.1.3
4.1.4
4.1.5
4.1.6
4.1.7
4.1.8
4.1.9
4.1.10
4.2-BETA-1
4.2
4.2.1
4.2.2
4.2.3
4.2.4
4.2.5
4.2.6
4.2.7
4.2.8
5.*
5.0-BETA-1
5.0-BETA-2
5.0
5.0.1
5.0.2
5.0.3
5.0.4
5.0.5
5.1-BETA-1
5.1
5.1.1
5.1.2
5.1.3
5.1.4
5.1.5
5.1.6
5.1.7
5.2-BETA-1
5.2.0
5.2.1
5.2.2
5.2.3
5.2.4
5.2.5
5.3.0-BETA-1
5.3.0-BETA-2
5.3.0
5.3.1
5.3.2
5.3.4
5.3.5
5.3.6
5.3.7
5.3.8
5.4.0-BETA-2
5.4.0
5.5.0
5.6.0-BETA-1
5.6.0

Database specific

last_known_affected_version_range 
"< 5.4.5"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-6v25-8wq6-xq4j/GHSA-6v25-8wq6-xq4j.json"