CVE-2026-62426: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-f8j9-mrwg-r7g5
Share
CVSS 8.8
CWE-412
Published
Advisory Summary

CVE-2026-62426 is a HIGH (CVSS 8.8) security vulnerability vulnerability (CWE-412: Unrestricted Externally Accessible Lock) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product properly checks for the existence of a lock, but the lock can be externally controlled or influenced by an actor that is outside of the intended sphere of control.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-62426 at a Glance

CVE Identifier CVE-2026-62426
GHSA Identifier GHSA-f8j9-mrwg-r7g5
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-412: Unrestricted Externally Accessible Lock
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 8.8

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

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

How to Fix CVE-2026-62426

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-2026-62426, 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-412: Unrestricted Externally Accessible Lock, where the product properly checks for the existence of a lock, but the lock can be externally controlled or influenced by an actor that is outside of the intended sphere of control. 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

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] To manage the system, sysctl and platform operations are used by the control domain or a possible Xenstore domain. Some of these operations may not be executed in parallel, so a system-wide lock each is used. The way those locks are acquired is, however, not providing any fairness. Furthermore, with XSM/Flask in use, the lock acquire will, for some operations, occur ahead of any permission checking. The sysctl issue is CVE-2026-62426. The platform-op issue is CVE-2026-62427.

References

NVD — CVE-2026-62426 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-62426
xenbits.xenproject.org/xsa/advisory-499.ht... WEB
https://xenbits.xenproject.org/xsa/advisory-499.html

Frequently Asked Questions

What is CVE-2026-62426?
CVE-2026-62426 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-412: Unrestricted Externally Accessible Lock.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-62426?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-62426?
CVE-2026-62426 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-62426?
CVE-2026-62426 is classified under CWE-412: Unrestricted Externally Accessible Lock (The product properly checks for the existence of a lock, but the lock can be externally controlled or influenced by an actor that is outside of the intended sphere of control.).
How can I check Maven dependencies for CVE-2026-62426?
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-f8j9-mrwg-r7g5",
  "modified" : "2026-07-28T18:33:02Z",
  "published" : "2026-07-28T15:32:17Z",
  "aliases" : [ "CVE-2026-62426" ],
  "details" : "[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\nTo manage the system, sysctl and platform operations are used by the\ncontrol domain or a possible Xenstore domain.  Some of these operations\nmay not be executed in parallel, so a system-wide lock each is used.\nThe way those locks are acquired is, however, not providing any fairness.\nFurthermore, with XSM/Flask in use, the lock acquire will, for some\noperations, occur ahead of any permission checking.\n\nThe sysctl issue is CVE-2026-62426.\n\nThe platform-op issue is CVE-2026-62427.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-62426"
  }, {
    "type" : "WEB",
    "url" : "https://xenbits.xenproject.org/xsa/advisory-499.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-412" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-28T13:19:01Z"
  }
}