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Infinispan: Deserialization of untrusted data in the Hot Rod Java client via automatic byte-array deserializationGHSA-4hhg-8ghq-vwq6

HIGHFix: infinispan/infinispan#5116

GHSA-4hhg-8ghq-vwq6 is a high-severity (CVSS 8.8) CWE-138 vulnerability in org.infinispan:infinispan-core. A fix is available for org.infinispan:infinispan-core — see the affected versions and patch details below.

Also known asCVE-2016-0750
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 8, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
2.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs84th percentile — riskier than 84% of all scored CVEsHighest risk
0.00%1.00%1.99%2.99%0.5%2.4%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

GHSA-4hhg-8ghq-vwq6 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 384,534 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
☕org.infinispan:infinispan-core

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

The hotrod java client in infinispan before 9.1.0.Final automatically deserializes bytearray message contents in certain events. A malicious user could exploit this flaw by injecting a specially-crafted serialized object to attain remote code execution or conduct other attacks.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.infinispan:infinispan-coreall versions9.1.0.Finalorg.infinispan:infinispan-core:9.1.0.Final

Affected Products

1 product · 1 configurations
Application
infinispaninfinispan
< 9.1.0
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.infinispan:infinispan-core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.infinispan:infinispan-core to 9.1.0.Final or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-4hhg-8ghq-vwq6 is resolved across your whole dependency graph.

  3. Workarounds

    Do not deserialise data from untrusted sources: where the format allows it, restrict deserialisation to an explicit allowlist of expected types, and prefer a data-only format (JSON, Protobuf) over one that can reconstruct arbitrary objects until you can upgrade.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate
RHSA-2017:3244Red Hat JBoss Data Grid 7.1RHSA-2018:0501Red Hat Single Sign-On 7.2.1 zip

Frequently Asked Questions

The hotrod java client in infinispan before 9.1.0.Final automatically deserializes bytearray message contents in certain events. A malicious user could exploit this flaw by injecting a specially-crafted serialized object to attain remote code execution or conduct other attacks.
O3 Security · Impact-Aware SCA

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