CVE-2026-12323
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DOM Spoofing in Firefox

Publication date: 2026-06-16

Last updated on: 2026-06-16

Assigner: Mozilla Corporation

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

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Meta Information

Published
2026-06-16
Last Modified
2026-06-16
Generated
2026-07-06
AI Q&A
2026-06-16
EPSS Evaluated
2026-07-05
NVD
CVE-2026-12323
EUVD
EUVD-2026-37069

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
mozilla firefox to 152.0.0 (exc)
mozilla thunderbird to 152.0.0 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-1021 The web application does not restrict or incorrectly restricts frame objects or UI layers that belong to another application or domain, which can lead to user confusion about which interface the user is interacting with.

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Executive Summary

This vulnerability is a spoofing issue in the Document Object Model (DOM) related to the Core and HTML components of Firefox. It allows an attacker to potentially deceive users by manipulating how web content is presented or interpreted.

The issue was addressed and fixed in Firefox version 152.

Impact Analysis

This spoofing vulnerability could allow attackers to mislead users by presenting false or manipulated web content, potentially leading to phishing attacks or other forms of deception.

Mitigation Strategies

To mitigate this vulnerability, update Firefox to version 152 or later where the spoofing issue in the DOM: Core & HTML component has been fixed.

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