# CVE-2016-10750: Deserialization of Untrusted Data in Hazelcast

> Remote attackers can execute arbitrary code on Hazelcast instances by sending crafted join requests exploiting unsafe Java deserialization.

- **Severity:** High 8.1 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 22 May 2019
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-jv65-pf7v-f7p8

## What is CVE-2016-10750?

CVE-2016-10750 is a high-severity unsafe deserialization vulnerability in n/a, published on 22 May 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In Hazelcast before 3.11, the cluster join procedure is vulnerable to remote code execution via Java deserialization. If an attacker can reach a listening Hazelcast instance with a crafted JoinRequest, and vulnerable classes exist in the classpath, the attacker can run arbitrary code.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2016-10750?

2 open source packages ship an affected version, including com.hazelcast:hazelcast. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `com.hazelcast:hazelcast` | Maven | All versions | 3.11 |
| `com.hazelcast:hazelcast` | Maven | All versions | 3.11 |

Products: Hazelcast Hazelcast.

## How do I fix CVE-2016-10750?

Upgrade com.hazelcast:hazelcast to 3.11 or later.

## Is CVE-2016-10750 being exploited?

There is no known exploitation of CVE-2016-10750 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2020-26168](https://insights.sbomify.com/CVE-2020-26168/): Auth bypass in n/a (critical 9.8)
- [CVE-2022-36437](https://insights.sbomify.com/CVE-2022-36437/): Hazelcast connection caching (critical 9.1)
- [CVE-2023-33265](https://insights.sbomify.com/CVE-2023-33265/): Hazelcast Executor Services don't check client permissions properly (high 8.8)
- [CVE-2023-45859](https://insights.sbomify.com/CVE-2023-45859/): Missing permission checks on Hazelcast client protocol (high 7.6)
- [CVE-2022-0265](https://insights.sbomify.com/CVE-2022-0265/): Improper Restriction of XML External Entity Reference in hazelcast/hazelcast (high 7.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-10750 and fix it if it is affected.

What it is: CVE-2016-10750 is a high-severity unsafe deserialization vulnerability in n/a, published on 22 May 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2016-10750 in the wild and no public exploit code.

Affected packages and fixed versions:
- com.hazelcast:hazelcast (Maven): affected all versions; fixed in 3.11
- com.hazelcast:hazelcast (Maven): affected all versions; fixed in 3.11

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2016-10750/ (Markdown: https://insights.sbomify.com/CVE-2016-10750/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-10750
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-10750
- OSV: https://osv.dev/vulnerability/CVE-2016-10750

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-10750/
Summaries are generated and may contain mistakes; the official description above is the record.