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CVE-2026-16441 Eclipse Foundation CVE debrief

CVE-2026-16441 is a vulnerability 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. The CVSS score is 6.9, and the severity is MEDIUM. This vulnerability affects users of Eclipse OpenJ9 versions up to 0.60, who should be aware of this vulnerability and take necessary actions to mitigate it.

Vendor
Eclipse Foundation
Product
OpenJ9
CVSS
MEDIUM 6.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-21
Original CVE updated
2026-08-18
Advisory published
2026-07-21
Advisory updated
2026-08-18

Who should care

Users of Eclipse OpenJ9 versions up to 0.60, security teams, and operators who manage these systems should be aware of this vulnerability and take necessary actions to mitigate it. They should review their deployments, assess potential exposure, and apply patches or updates as necessary.

Technical summary

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. This vulnerability has a CVSS score of 6.9 and a severity of MEDIUM. Affected users should assess their usage of Eclipse OpenJ9 versions up to 0.60 and apply patches or updates as necessary.

Defensive priority

Medium priority should be given to patching or mitigating this vulnerability, as it has a MEDIUM severity score. Users should focus on patching or mitigating this vulnerability as part of their regular security maintenance and risk management processes.

Recommended defensive actions

  • Inventory and assess usage of affected Eclipse OpenJ9 versions
  • Apply patches or updates to Eclipse OpenJ9 versions up to 0.60
  • Monitor for potential exploitation attempts
  • Review and update security configurations
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-07-21T19:17:09.990Z and was last modified on 2026-07-22T20:37:38.603Z. The NVD entry is currently Awaiting Analysis. This information is based on the provided source corpus and may not reflect the current status. Users should verify the information with the official sources for the most up-to-date details.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-16441 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-16441

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-16441 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-16441

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.