CVE-2026-89406: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-vpwx-33j2-2p7h
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CVSS 7.5
CWE-862
Published
Advisory Summary

CVE-2026-89406 is a HIGH (CVSS 7.5) security vulnerability vulnerability (CWE-862: Missing Authorization) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not perform an authorization check when an actor attempts to access a resource or perform an action.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-89406 at a Glance

CVE Identifier CVE-2026-89406
GHSA Identifier GHSA-vpwx-33j2-2p7h
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-862: Missing Authorization
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.5

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:N/A:N).

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 None (I:N)
Availability None (A:N)

How to Fix CVE-2026-89406

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-2026-89406, 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-862: Missing Authorization, where the product does not perform an authorization check when an actor attempts to access a resource or perform an action. 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 Modula Image Gallery – Photo Grid & Video Gallery plugin for WordPress is vulnerable to unauthorized disclosure of private gallery contents in versions up to, and including, 3.0.1. This is due to the Modula_Meta::add_metas() function being hooked to wp_head on every frontend request and looking up any post via get_post( $_GET['modula_gallery_id'] ) without verifying the gallery's post_status or the requester's capability to read it — the gallery-side input guard is bugged (empty('modula_gallery_id') tests a nonempty string literal instead of the GET parameter, so it is always false), the only object validation is a post_type === 'modula-gallery' check, and no is_user_logged_in()/current_user_can('read_post', $gallery_id) check is performed. This makes it possible for unauthenticated attackers to enumerate private modula-gallery posts and their member attachments and recover the image's title, description, dimensions, and original upload URL via Open Graph/Twitter meta tags emitted in the response, which then allows direct unauthenticated download of the original private image bytes.

References

NVD — CVE-2026-89406 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89406
plugins.trac.wordpress.org/browser/modula-best... WEB
https://plugins.trac.wordpress.org/browser/modula-best-grid-gallery/tags/3.0.1/includes/public/meta/class-modula-meta.php#L142
plugins.trac.wordpress.org/browser/modula-best... WEB
https://plugins.trac.wordpress.org/browser/modula-best-grid-gallery/tags/3.0.1/includes/public/meta/class-modula-meta.php#L26
plugins.trac.wordpress.org/browser/modula-best... WEB
https://plugins.trac.wordpress.org/browser/modula-best-grid-gallery/tags/3.0.1/includes/public/meta/class-modula-meta.php#L50
plugins.trac.wordpress.org/browser/modula-best... WEB
https://plugins.trac.wordpress.org/browser/modula-best-grid-gallery/tags/3.0.1/includes/public/meta/social_meta.php#L8
plugins.trac.wordpress.org/changeset WEB
https://plugins.trac.wordpress.org/changeset?reponame=&old=3697043%40modula-best-grid-gallery&new=3697043%40modula-best-grid-gallery
www.wordfence.com/threat-intel/vulner... WEB
https://www.wordfence.com/threat-intel/vulnerabilities/id/a369dff6-feca-47cf-8511-dc75c4ffdd29?source=cve

Frequently Asked Questions

What is CVE-2026-89406?
CVE-2026-89406 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-862: Missing Authorization.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-89406?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-89406?
CVE-2026-89406 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2026-89406?
CVE-2026-89406 is classified under CWE-862: Missing Authorization (The product does not perform an authorization check when an actor attempts to access a resource or perform an action.).
How can I check Maven dependencies for CVE-2026-89406?
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-vpwx-33j2-2p7h",
  "modified" : "2026-09-25T09:31:08Z",
  "published" : "2026-09-25T09:31:08Z",
  "aliases" : [ "CVE-2026-89406" ],
  "details" : "The Modula Image Gallery – Photo Grid & Video Gallery plugin for WordPress is vulnerable to unauthorized disclosure of private gallery contents in versions up to, and including, 3.0.1. This is due to the Modula_Meta::add_metas() function being hooked to wp_head on every frontend request and looking up any post via get_post( $_GET['modula_gallery_id'] ) without verifying the gallery's post_status or the requester's capability to read it — the gallery-side input guard is bugged (empty('modula_gallery_id') tests a nonempty string literal instead of the GET parameter, so it is always false), the only object validation is a post_type === 'modula-gallery' check, and no is_user_logged_in()/current_user_can('read_post', $gallery_id) check is performed. This makes it possible for unauthenticated attackers to enumerate private modula-gallery posts and their member attachments and recover the image's title, description, dimensions, and original upload URL via Open Graph/Twitter meta tags emitted in the response, which then allows direct unauthenticated download of the original private image bytes.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-89406"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/modula-best-grid-gallery/tags/3.0.1/includes/public/meta/class-modula-meta.php#L142"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/modula-best-grid-gallery/tags/3.0.1/includes/public/meta/class-modula-meta.php#L26"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/modula-best-grid-gallery/tags/3.0.1/includes/public/meta/class-modula-meta.php#L50"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/browser/modula-best-grid-gallery/tags/3.0.1/includes/public/meta/social_meta.php#L8"
  }, {
    "type" : "WEB",
    "url" : "https://plugins.trac.wordpress.org/changeset?reponame=&old=3697043%40modula-best-grid-gallery&new=3697043%40modula-best-grid-gallery"
  }, {
    "type" : "WEB",
    "url" : "https://www.wordfence.com/threat-intel/vulnerabilities/id/a369dff6-feca-47cf-8511-dc75c4ffdd29?source=cve"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-862" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-25T08:16:40Z"
  }
}