CVE-2026-35227: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-qc33-pwh4-j9rq
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CWE-772
Published
Advisory Summary

CVE-2026-35227 is a HIGH security vulnerability vulnerability (CWE-772: Missing Release of Resource after Effective Lifetime) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-35227 at a Glance

CVE Identifier CVE-2026-35227
GHSA Identifier GHSA-qc33-pwh4-j9rq
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-772: Missing Release of Resource after Effective Lifetime
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-35227

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-2026-35227, 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-772: Missing Release of Resource after Effective Lifetime, where the product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed. 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

An unauthenticated remote attacker may exhaust all available TCP connections in the CODESYS Modbus TCP Server stack if a race condition in connection handling is successfully exploited, preventing legitimate clients from establishing new connections.

References

NVD — CVE-2026-35227 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-35227
certvde.com/de/advisories/vde-2... WEB
https://certvde.com/de/advisories/VDE-2026-042

Frequently Asked Questions

What is CVE-2026-35227?
CVE-2026-35227 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-772: Missing Release of Resource after Effective Lifetime.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-35227?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-35227?
CVE-2026-35227 is classified under CWE-772: Missing Release of Resource after Effective Lifetime (The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.).
How can I check Maven dependencies for CVE-2026-35227?
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-qc33-pwh4-j9rq",
  "modified" : "2026-05-12T09:31:30Z",
  "published" : "2026-05-12T09:31:30Z",
  "aliases" : [ "CVE-2026-35227" ],
  "details" : "An unauthenticated remote attacker may exhaust all available TCP connections in the CODESYS Modbus TCP Server stack if a race condition in connection handling is successfully exploited, preventing legitimate clients from establishing new connections.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/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" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-35227"
  }, {
    "type" : "WEB",
    "url" : "https://certvde.com/de/advisories/VDE-2026-042"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-772" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-05-12T08:16:08Z"
  }
}