CVE-2026-78437: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-hvg5-8g86-xm44
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CWE-459
Published
Advisory Summary

CVE-2026-78437 is a security vulnerability vulnerability (CWE-459: Incomplete Cleanup) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not properly "clean up" and remove temporary or supporting resources after they have been used.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-78437 at a Glance

CVE Identifier CVE-2026-78437
GHSA Identifier GHSA-hvg5-8g86-xm44
Severity N/A
CVSS v3.1 Base Score N/A
CWE Classification CWE-459: Incomplete Cleanup
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-78437

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-2026-78437, 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-459: Incomplete Cleanup, where the product does not properly "clean up" and remove temporary or supporting resources after they have been used. 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

Incomplete cleanup vulnerability in Apache Tomcat allows a malformed request to potentially (depends on timing) cause one request from another user to fail. This issue affects Apache Tomcat: from 11.0.19 through 11.0.25, from 10.1.53 through 10.1.59, from 9.0.116 through 9.0.121. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.

References

NVD — CVE-2026-78437 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-78437
lists.apache.org/thread/qkmsos3s8chn... WEB
https://lists.apache.org/thread/qkmsos3s8chn5053qr466rzwv6sk5gjg

Frequently Asked Questions

What is CVE-2026-78437?
CVE-2026-78437 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-459: Incomplete Cleanup.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-78437?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-78437?
CVE-2026-78437 is classified under CWE-459: Incomplete Cleanup (The product does not properly "clean up" and remove temporary or supporting resources after they have been used.).
How can I check Maven dependencies for CVE-2026-78437?
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-hvg5-8g86-xm44",
  "modified" : "2026-09-23T12:31:15Z",
  "published" : "2026-09-23T12:31:15Z",
  "aliases" : [ "CVE-2026-78437" ],
  "details" : "Incomplete cleanup vulnerability in Apache Tomcat allows a malformed request to potentially (depends on timing) cause one request from another user to fail.\n\n\n\nThis issue affects Apache Tomcat: from 11.0.19 through 11.0.25, from 10.1.53 through 10.1.59, from 9.0.116 through 9.0.121.\n\n\n\nUsers are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-78437"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/qkmsos3s8chn5053qr466rzwv6sk5gjg"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-459" ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-23T12:17:07Z"
  }
}