CVE-2026-16439: Eclipse OPENJ9

Critical severity, CVSS 9.1. EPSS: 0.4% chance of exploitation in the next 30 days.

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

Affected products

• Eclipse OPENJ9: from 0.8.0, before 0.60.0 (fixed in 0.60.0)

Published 2026-07-21. Last modified 2026-08-11.