CVE-2026-16441: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-cp45-6q6c-3772
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CVSS 9.6
CWE-758
Published
Advisory Summary

CVE-2026-16441 is a MODERATE (CVSS 9.6) security vulnerability vulnerability (CWE-758: Reliance on Undefined, Unspecified, or Implementation-Defined Behavior) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product uses an api function, data structure, or other entity in a way that relies on properties that are not always guaranteed to hold for that entity.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-16441 at a Glance

CVE Identifier CVE-2026-16441
GHSA Identifier GHSA-cp45-6q6c-3772
Severity MODERATE
CVSS v3.1 Base Score 9.6
CWE Classification CWE-758: Reliance on Undefined, Unspecified, or Implementation-Defined Behavior
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.6

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-16441

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-16441, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-758: Reliance on Undefined, Unspecified, or Implementation-Defined Behavior, where the product uses an api function, data structure, or other entity in a way that relies on properties that are not always guaranteed to hold for that entity. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

References

GitHub Advisory / Wiki ADVISORY
https://github.com/eclipse-openj9/openj9/security/advisories/GHSA-hcfc-9hjx-2q7f
NVD — CVE-2026-16441 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-16441
Software Source Repository REPOSITORY
https://github.com/eclipse-openj9/openj9/pull/24396
Software Security Information SECURITY
https://gitlab.eclipse.org/security/cve-assignment/-/work_items/194

Frequently Asked Questions

What is CVE-2026-16441?
CVE-2026-16441 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-758: Reliance on Undefined, Unspecified, or Implementation-Defined Behavior.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-16441?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-16441?
CVE-2026-16441 has a CVSS v3.1 base score of 9.6 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.
What CWE is associated with CVE-2026-16441?
CVE-2026-16441 is classified under CWE-758: Reliance on Undefined, Unspecified, or Implementation-Defined Behavior (The product uses an API function, data structure, or other entity in a way that relies on properties that are not always guaranteed to hold for that entity.).
How can I check Maven dependencies for CVE-2026-16441?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-cp45-6q6c-3772",
  "modified" : "2026-08-18T21:31:36Z",
  "published" : "2026-07-21T21:32:39Z",
  "aliases" : [ "CVE-2026-16441" ],
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:N/VI:H/VA:L/SC:L/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/eclipse-openj9/openj9/security/advisories/GHSA-hcfc-9hjx-2q7f"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-16441"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/eclipse-openj9/openj9/pull/24396"
  }, {
    "type" : "WEB",
    "url" : "https://gitlab.eclipse.org/security/cve-assignment/-/work_items/194"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-758" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-21T19:17:09Z"
  }
}