CVE-2026-12323: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-xp8h-82pc-f6jm
Share
CVSS 5.4
CWE-1021
Published
Advisory Summary

CVE-2026-12323 is a MODERATE (CVSS 5.4) security vulnerability vulnerability (CWE-1021: Improper Restriction of Rendered UI Layers or Frames) affecting Software libraries in the Maven ecosystem. The weakness occurs when the web application does not restrict or incorrectly restricts frame objects or ui layers that belong to another application or domain.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-12323 at a Glance

CVE Identifier CVE-2026-12323
GHSA Identifier GHSA-xp8h-82pc-f6jm
Severity MODERATE
CVSS v3.1 Base Score 5.4
CWE Classification CWE-1021: Improper Restriction of Rendered UI Layers or Frames
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.4

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:R/S:U/C:L/I:N/A:L).

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

How to Fix CVE-2026-12323

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-2026-12323, 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-1021: Improper Restriction of Rendered UI Layers or Frames, where the web application does not restrict or incorrectly restricts frame objects or ui layers that belong to another application or domain. 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

Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 152.

References

NVD — CVE-2026-12323 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-12323
bugzilla.mozilla.org/show_bug.cgi WEB
https://bugzilla.mozilla.org/show_bug.cgi?id=2035027
Software Security Information SECURITY
https://www.mozilla.org/security/advisories/mfsa2026-57
Software Security Information SECURITY
https://www.mozilla.org/security/advisories/mfsa2026-60

Frequently Asked Questions

What is CVE-2026-12323?
CVE-2026-12323 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-1021: Improper Restriction of Rendered UI Layers or Frames.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-12323?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-12323?
CVE-2026-12323 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L.
What CWE is associated with CVE-2026-12323?
CVE-2026-12323 is classified under CWE-1021: Improper Restriction of Rendered UI Layers or Frames (The web application does not restrict or incorrectly restricts frame objects or UI layers that belong to another application or domain.).
How can I check Maven dependencies for CVE-2026-12323?
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-xp8h-82pc-f6jm",
  "modified" : "2026-06-16T18:32:37Z",
  "published" : "2026-06-16T15:33:50Z",
  "aliases" : [ "CVE-2026-12323" ],
  "details" : "Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 152.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-12323"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.mozilla.org/show_bug.cgi?id=2035027"
  }, {
    "type" : "WEB",
    "url" : "https://www.mozilla.org/security/advisories/mfsa2026-57"
  }, {
    "type" : "WEB",
    "url" : "https://www.mozilla.org/security/advisories/mfsa2026-60"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1021" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-06-16T13:16:33Z"
  }
}