CVE-2026-16439: Eclipse OpenJ9 : Using -Xtrace to trace method arguments can lead to buffer underflow

Critical severity · published Jul 21, 2026

CVE-2026-16439

Eclipse OpenJ9 : Using -Xtrace to trace method arguments can lead to buffer underflow

9.1

CVSS

0.4%

EPSS

On KEV

Description

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

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

None

Integrity

High

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.4% · higher than 37% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

OpenJ9 · Eclipse Foundation

0.8.0 before 0.60.0 · source: vendor, NVD

Affected product

OpenJ9

Eclipse Foundation

All OpenJ9 CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-16439

CVE.org

https://www.cve.org/CVERecord?id=CVE-2026-16439

Issue Tracking

https://github.com/eclipse-openj9/openj9/pull/24394

Broken Link

https://gitlab.eclipse.org/security/cve-assignment/-/work_items/192