CVE-2022-36437

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-12-29 · updated 2026-06-17
Weakness: CWE-384

Description

The Connection handler in Hazelcast and Hazelcast Jet allows a remote unauthenticated attacker to access and manipulate data in the cluster with the identity of another already authenticated connection. The affected Hazelcast versions are through 4.0.6, 4.1.9, 4.2.5, 5.0.3, and 5.1.2. The affected Hazelcast Jet versions are through 4.5.3.

Affected products

hazelcast: before 3.12.13; from 4.0.0 before 4.1.10; from 4.2.0 before 4.2.6; from 5.0.0 before 5.0.4; from 5.1.0 before 5.1.3 — fixed in 3.12.13, 4.1.10, 4.2.6, 5.0.4, 5.1.3
Hazelcast-Jet: before 4.5.4 — fixed in 4.5.4

How to fix

Upgrade to a fixed version: hazelcast 3.12.13, 4.1.10, 4.2.6, 5.0.4; Hazelcast-Jet 4.5.4. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2022-36437 or the next vulnerability affects your stack