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CVE-2026-16439

Eclipse Openj9 vulnerability

9.1 CRITICALEPSS 0.43%
  1. Published21 Jul 2026

Description

In Eclipse OpenJ9 versions up to 0.60, using -Xtrace to trace method arguments can lead to buffer underflow.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected products

Eclipse Openj9≥ 0.8.0 < 0.60.0

Remediation

Fixed in
Eclipse Openj9≥ 0.60.0

References

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Frequently asked

Is CVE-2026-16439 being actively exploited?

CVE-2026-16439 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.43%.

How severe is CVE-2026-16439?

CVE-2026-16439 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.43% probability of exploitation.

Which products are affected by CVE-2026-16439?

Affected products include Eclipse Openj9.

How do I fix CVE-2026-16439?

Upgrade affected software to a fixed version, for example Eclipse Openj9 0.60.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-16439 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.