CVE-2023-45859

Severity: high (CVSS 7.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-02-28 · updated 2026-06-17
Weakness: CWE-922

Description

In Hazelcast through 4.1.10, 4.2 through 4.2.8, 5.0 through 5.0.5, 5.1 through 5.1.7, 5.2 through 5.2.4, and 5.3 through 5.3.2, some client operations don't check permissions properly, allowing authenticated users to access data stored in the cluster.

Affected products

hazelcast: through 4.1.10; from 4.2.0 through 4.2.8; from 5.0.0 through 5.0.5; from 5.1.0 through 5.1.7; from 5.2.0 before 5.2.5; from 5.3.0 before 5.3.5 — fixed in 5.2.5, 5.3.5

How to fix

Upgrade to a fixed version: hazelcast 5.2.5, 5.3.5. Check the vendor advisory for mitigations.

References

https://github.com/hazelcast/hazelcast/pull/25509
https://github.com/hazelcast/hazelcast/security/advisories/GHSA-xh6m-7cr7-xx66
https://github.com/hazelcast/hazelcast/pull/25509
https://github.com/hazelcast/hazelcast/security/advisories/GHSA-xh6m-7cr7-xx66

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