CVE-2026-4249: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-7469-8h9r-c5xc
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CVSS 8.6
CWE-707
Published
Advisory Summary

CVE-2026-4249 is a HIGH (CVSS 8.6) security vulnerability vulnerability (CWE-707: Improper Neutralization) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not ensure or incorrectly ensures that structured messages or data are well-formed and that certain security properties are met before being read from an upstream component or sent to a downstream component.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-4249 at a Glance

CVE Identifier CVE-2026-4249
GHSA Identifier GHSA-7469-8h9r-c5xc
Severity HIGH
CVSS v3.1 Base Score 8.6
CWE Classification CWE-707: Improper Neutralization
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 8.6

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

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

How to Fix CVE-2026-4249

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-2026-4249, 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-707: Improper Neutralization, where the product does not ensure or incorrectly ensures that structured messages or data are well-formed and that certain security properties are met before being read from an upstream component or sent to a downstream component. 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

The throttling event handling mechanism in multiple WSO2 products accepts user-supplied JSON payloads without sufficient validation of their structure and content. This allows an unauthenticated remote attacker to inject malicious JSON data that can lead to a persistent denial of service condition. Successful exploitation of this vulnerability can disrupt the API Gateway, preventing legitimate API traffic from being processed and impacting complete service availability. The denial of service is persistent, requiring manual intervention to restore normal operations.

References

NVD — CVE-2026-4249 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4249
Software Security Information SECURITY
https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5236

Frequently Asked Questions

What is CVE-2026-4249?
CVE-2026-4249 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-707: Improper Neutralization.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-4249?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-4249?
CVE-2026-4249 has a CVSS v3.1 base score of 8.6 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
What CWE is associated with CVE-2026-4249?
CVE-2026-4249 is classified under CWE-707: Improper Neutralization (The product does not ensure or incorrectly ensures that structured messages or data are well-formed and that certain security properties are met before being read from an upstream component or sent to a downstream component.).
How can I check Maven dependencies for CVE-2026-4249?
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-7469-8h9r-c5xc",
  "modified" : "2026-07-06T12:31:30Z",
  "published" : "2026-07-06T12:31:30Z",
  "aliases" : [ "CVE-2026-4249" ],
  "details" : "The throttling event handling mechanism in multiple WSO2 products accepts user-supplied JSON payloads without sufficient validation of their structure and content. This allows an unauthenticated remote attacker to inject malicious JSON data that can lead to a persistent denial of service condition.\n\nSuccessful exploitation of this vulnerability can disrupt the API Gateway, preventing legitimate API traffic from being processed and impacting complete service availability. The denial of service is persistent, requiring manual intervention to restore normal operations.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-4249"
  }, {
    "type" : "WEB",
    "url" : "https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5236"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-707" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-06T11:16:30Z"
  }
}