CVE-2026-110684: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-pjjg-2ww8-r6xm
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CWE-401
Published
Advisory Summary

CVE-2026-110684 is a security vulnerability vulnerability (CWE-401: Missing Release of Memory after Effective Lifetime) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-110684 at a Glance

CVE Identifier CVE-2026-110684
GHSA Identifier GHSA-pjjg-2ww8-r6xm
Severity N/A
CVSS v3.1 Base Score N/A
CWE Classification CWE-401: Missing Release of Memory after Effective Lifetime
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-110684

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-2026-110684, 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-401: Missing Release of Memory after Effective Lifetime, where the product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse. 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

Cpanel::JSON::XS versions from 3.0202 before 4.80 for Perl leak memory and retain overloaded objects when encoding values as strings in encode_stringify. encode_stringify writes a value in its string form under allow_stringify, under convert_blessed for objects without TO_JSON, and under allow_bignum. For an array or hash object with a "" overload, and from 4.20 a scalar object, it takes an extra reference that is never released, so the object and everything it references are never freed. From 4.10 it also never frees its copy of the string. Repeatedly encoding data that contains such values grows process memory without bound.

References

NVD — CVE-2026-110684 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-110684
Security Fix Commit FIX COMMIT
https://github.com/rurban/Cpanel-JSON-XS/commit/5b15916b5e7841e447664ace51fb50c12d1e0f39.patch
metacpan.org/release/rurban/cpan... WEB
https://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.80/changes

Frequently Asked Questions

What is CVE-2026-110684?
CVE-2026-110684 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-401: Missing Release of Memory after Effective Lifetime.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-110684?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-110684?
CVE-2026-110684 is classified under CWE-401: Missing Release of Memory after Effective Lifetime (The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.).
How can I check Maven dependencies for CVE-2026-110684?
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-pjjg-2ww8-r6xm",
  "modified" : "2026-10-19T21:36:28Z",
  "published" : "2026-10-19T21:36:28Z",
  "aliases" : [ "CVE-2026-110684" ],
  "details" : "Cpanel::JSON::XS versions from 3.0202 before 4.80 for Perl leak memory and retain overloaded objects when encoding values as strings in encode_stringify.\n\nencode_stringify writes a value in its string form under allow_stringify, under convert_blessed for objects without TO_JSON, and under allow_bignum. For an array or hash object with a \"\" overload, and from 4.20 a scalar object, it takes an extra reference that is never released, so the object and everything it references are never freed. From 4.10 it also never frees its copy of the string.\n\nRepeatedly encoding data that contains such values grows process memory without bound.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-110684"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rurban/Cpanel-JSON-XS/commit/5b15916b5e7841e447664ace51fb50c12d1e0f39.patch"
  }, {
    "type" : "WEB",
    "url" : "https://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.80/changes"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-401" ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-10-19T19:17:21Z"
  }
}