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GHSA-hcfc-9hjx-2q7f

Fix: eclipse-openj9/openj9#24396

GHSA-hcfc-9hjx-2q7f is a CWE-758 vulnerability. O3 Security confirms whether GHSA-hcfc-9hjx-2q7f is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Eclipse OpenJ9 : Method resolution default method precedence failure

Published
Jul 21, 2026
Updated
Aug 14, 2026
Affected
0 pkgs
Patched
None yet
Exploits
None indexed
Exploitation data as of Aug 14, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

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.

Detection & mitigation playbook

Vulnerability
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for the affected component. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Remediation status

    No patched version of the affected component has shipped for GHSA-hcfc-9hjx-2q7f yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.

  3. Mitigate without a patch

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether GHSA-hcfc-9hjx-2q7f is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-hcfc-9hjx-2q7f. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

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.
O3 Security · Impact-Aware SCA

Is GHSA-hcfc-9hjx-2q7f in your dependencies?

O3 detects GHSA-hcfc-9hjx-2q7f across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

GHSA-hcfc-9hjx-2q7f: vulnerability details,… | O3 Security