CVE-2026-33728: dd-trace-java is a Datadog APM client for Java

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CRITICAL 9.8REMOTEUPGRADE

CVE-2026-33728 is a critical-severity flaw (CVSS 9.8) affecting dd-trace-java. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

dd-trace-java is a Datadog APM client for Java. In versions of dd-trace-java 0.40.0 through prior to 1.60.2, the RMI instrumentation registered a custom endpoint that deserialized incoming data without applying serialization filters. On JDK version 16 and earlier, an attacker with network access to a JMX or RMI port on an instrumented JVM could exploit this to potentially achieve remote code execution. All three of the following conditions must b

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-502
Published	2026-03-27
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: datadog

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

Am I affected?

Timeline

2026-03-27 01:16 UTCPublished CVE record published
2026-06-17 10:37 UTCUpdated Record last modified

datadog dd-trace-java UPGRADE

Affected: >= 0.40.0 and < 1.60.3

Fixed in: 1.60.3

Safe to downgrade to: a release before 0.40.0

1. Check installed version

apt-cache policy dd-trace-java || rpm -q dd-trace-java || dd-trace-java --version

2. UPGRADE to 1.60.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade dd-trace-java

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade dd-trace-java

Note

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

3. If no update is available yet, DOWNGRADE to a release before 0.40.0 (Debian / Ubuntu)

apt-cache madison dd-trace-java sudo apt install dd-trace-java=<VERSION_BEFORE_0.40.0> sudo apt-mark hold dd-trace-java

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list dd-trace-java sudo dnf downgrade dd-trace-java-<VERSION_BEFORE_0.40.0> sudo dnf versionlock add dd-trace-java

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-33728?

dd-trace-java: upgrade to 1.60.3. Exact commands for each OS are on this page.

Is CVE-2026-33728 being exploited?

CVE-2026-33728 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-2026-33728 affect?

CVE-2026-33728 affects dd-trace-java. Severity is critical (CVSS 9.8). dd-trace-java is a Datadog APM client for Java. In versions of dd-trace-java 0.40.0 through prior to 1.60.2, the RMI instrumentation registered a custom endpoint that deserialized incoming data without applying serialization filters. On JDK

How urgent is CVE-2026-33728?

Priority 53/100. Critical severity; Remotely exploitable, no login, no user action

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References

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