CVE-2023-5236: A flaw was found in Infinispan, which does not detect circular object references when unmarshalling

Q: How do I fix CVE-2023-5236?

data grid: upgrade to 8.4.4; jboss data grid: mitigate or apply the listed mitigation; infinispan: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2023-5236 being exploited?

CVE-2023-5236 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-5236 affect?

CVE-2023-5236 affects data grid, jboss data grid, infinispan. Severity is medium (CVSS 4.4). A flaw was found in Infinispan, which does not detect circular object references when unmarshalling. An authenticated attacker with sufficient permissions could insert a maliciously constructed object into the cache and use it to cause out

Q: How urgent is CVE-2023-5236?

Priority 37/100. On your watchlist

Routine

MEDIUM 4.4WATCHLISTUPGRADEMITIGATEMITIGATE

CVE-2023-5236 is a medium-severity flaw (CVSS 4.4) affecting data grid, jboss data grid, infinispan. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in Infinispan, which does not detect circular object references when unmarshalling. An authenticated attacker with sufficient permissions could insert a maliciously constructed object into the cache and use it to cause out of memory errors and achieve a denial of service.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	4.4 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	High
User interaction	None
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Published	2023-12-18
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: infinispan · redhat

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-12-18 14:15 UTCPublished CVE record published
2026-06-17 06:48 UTCUpdated Record last modified

redhat data grid UPGRADE

Affected: < 8.4.4

Fixed in: 8.4.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy data-grid || rpm -q data-grid || data-grid --version

2. UPGRADE to 8.4.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade data-grid

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade data-grid

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

redhat jboss data grid MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy jboss-data-grid || rpm -q jboss-data-grid || jboss-data-grid --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

infinispan infinispan MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy infinispan || rpm -q infinispan || infinispan --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-5236?

data grid: upgrade to 8.4.4; jboss data grid: mitigate or apply the listed mitigation; infinispan: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-5236 being exploited?

CVE-2023-5236 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-5236 affect?

CVE-2023-5236 affects data grid, jboss data grid, infinispan. Severity is medium (CVSS 4.4). A flaw was found in Infinispan, which does not detect circular object references when unmarshalling. An authenticated attacker with sufficient permissions could insert a maliciously constructed object into the cache and use it to cause out

How urgent is CVE-2023-5236?

Priority 37/100. On your watchlist

Software pages

JBoss and WildFly vulnerabilities

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References

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