CVE-2026-63649: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-p428-592p-6c59
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CWE-183
Published
Advisory Summary

CVE-2026-63649 is a MODERATE security vulnerability vulnerability (CWE-183: Permissive List of Allowed Inputs) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are explicitly allowed by policy because the inputs are assumed to be safe, but the list is too permissive - that is, it allows an input that is unsafe, leading to resultant weaknesses.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-63649 at a Glance

CVE Identifier CVE-2026-63649
GHSA Identifier GHSA-p428-592p-6c59
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-183: Permissive List of Allowed Inputs
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-63649

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-2026-63649, 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-183: Permissive List of Allowed Inputs, where the product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are explicitly allowed by policy because the inputs are assumed to be safe, but the list is too permissive - that is, it allows an input that is unsafe, leading to resultant weaknesses. 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 Windows interactive service in OpenVPN 2.4.0 through 2.6.21 and 2.7_alpha1 through 2.7.5 allows local authenticated users to bypass the trusted configuration directory constraint and load arbitrary configuration files via crafted options that bypass whitelist checks

References

NVD — CVE-2026-63649 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63649
community.openvpn.net/releasehistory WEB
https://community.openvpn.net/ReleaseHistory#openvpn-2622-released-5-august-2026
community.openvpn.net/releasehistory WEB
https://community.openvpn.net/ReleaseHistory#openvpn-276-released-5-august-2026
Software Security Information SECURITY
https://community.openvpn.net/Security%20Announcements/CVE-2026-63649

Frequently Asked Questions

What is CVE-2026-63649?
CVE-2026-63649 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-183: Permissive List of Allowed Inputs.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-63649?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-63649?
CVE-2026-63649 is classified under CWE-183: Permissive List of Allowed Inputs (The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are explicitly allowed by policy because the inputs are assumed to be safe, but the list is too permissive - that is, it allows an input that is unsafe, leading to resultant weaknesses.).
How can I check Maven dependencies for CVE-2026-63649?
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-p428-592p-6c59",
  "modified" : "2026-08-15T00:31:23Z",
  "published" : "2026-08-15T00:31:23Z",
  "aliases" : [ "CVE-2026-63649" ],
  "details" : "The Windows interactive service in OpenVPN 2.4.0 through 2.6.21 and 2.7_alpha1 through 2.7.5 allows local authenticated users to bypass the trusted configuration directory constraint and load arbitrary configuration files via crafted options that bypass whitelist checks",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:L/VI:N/VA:N/SC:H/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-2026-63649"
  }, {
    "type" : "WEB",
    "url" : "https://community.openvpn.net/ReleaseHistory#openvpn-2622-released-5-august-2026"
  }, {
    "type" : "WEB",
    "url" : "https://community.openvpn.net/ReleaseHistory#openvpn-276-released-5-august-2026"
  }, {
    "type" : "WEB",
    "url" : "https://community.openvpn.net/Security%20Announcements/CVE-2026-63649"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-183" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-14T23:16:32Z"
  }
}