CVE-2026-16441: Eclipse OpenJ9 : Method resolution default method precedence failure

Severity: critical (CVSS 9.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-21 · updated 2026-10-24
Weakness: CWE-758

Description

In Eclipse OpenJ9 versions up to 0.60, when executing class files where a previously concrete superclass method has been recompiled as abstract, execution is incorrectly delegated to an interface default method.

Affected products

The Eclipse Foundation Eclipse OpenJ9: from 0.8.0 before 0.60.0 — fixed in 0.60.0

How to fix

Upgrade to a fixed version: The Eclipse Foundation Eclipse OpenJ9 0.60.0. Check the vendor advisory for mitigations.

References

https://github.com/eclipse-openj9/openj9/pull/24396
https://github.com/eclipse-openj9/openj9/security/advisories/GHSA-hcfc-9hjx-2q7f
https://gitlab.eclipse.org/security/cve-assignment/-/work_items/194

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