CVE-2026-44631: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-9jv8-9586-5r34
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CVSS 9.8
CWE-124
Published
Advisory Summary

CVE-2026-44631 is a CRITICAL (CVSS 9.8) security vulnerability vulnerability (CWE-124: Buffer Underwrite ('Buffer Underflow')) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product writes to a buffer using an index or pointer that references a memory location prior to the beginning of the buffer.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-44631 at a Glance

CVE Identifier CVE-2026-44631
GHSA Identifier GHSA-9jv8-9586-5r34
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-124: Buffer Underwrite ('Buffer Underflow')
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.8

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:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
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-2026-44631

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-2026-44631, 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-124: Buffer Underwrite ('Buffer Underflow'), where the product writes to a buffer using an index or pointer that references a memory location prior to the beginning of the buffer. 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

Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67. Users are recommended to upgrade to version 2.4.68, which fixes the issue.

References

NVD — CVE-2026-44631 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-44631
Software Security Information SECURITY
https://httpd.apache.org/security/vulnerabilities_24.html
Software Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/06/08/14

Frequently Asked Questions

What is CVE-2026-44631?
CVE-2026-44631 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-124: Buffer Underwrite ('Buffer Underflow').
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-44631?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-44631?
CVE-2026-44631 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-44631?
CVE-2026-44631 is classified under CWE-124: Buffer Underwrite ('Buffer Underflow') (The product writes to a buffer using an index or pointer that references a memory location prior to the beginning of the buffer.).
How can I check Maven dependencies for CVE-2026-44631?
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-9jv8-9586-5r34",
  "modified" : "2026-06-09T00:33:23Z",
  "published" : "2026-06-08T18:31:49Z",
  "aliases" : [ "CVE-2026-44631" ],
  "details" : "Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration.\n\nThis issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.\n\nUsers are recommended to upgrade to version 2.4.68, which fixes the issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-44631"
  }, {
    "type" : "WEB",
    "url" : "https://httpd.apache.org/security/vulnerabilities_24.html"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/06/08/14"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-124" ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-06-08T16:16:40Z"
  }
}