CVE-2026-6762
Received Received - Intake
DOM Spoofing Vulnerability in Firefox Core & HTML Components

Publication date: 2026-04-21

Last updated on: 2026-04-22

Assigner: Mozilla Corporation

Description
Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
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Meta Information
Published
2026-04-21
Last Modified
2026-04-22
Generated
2026-06-16
AI Q&A
2026-04-21
EPSS Evaluated
2026-06-15
NVD
CVE-2026-6762
EUVD
EUVD-2026-24103
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
mozilla firefox to 150.0 (exc)
mozilla firefox to 140.10.0 (exc)
mozilla thunderbird From 140.0 (inc) to 140.10.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-290 This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.
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Executive Summary

This vulnerability is a spoofing issue found in the DOM: Core & HTML component of Mozilla Firefox. It allows an attacker to potentially deceive users by manipulating the Document Object Model (DOM) in a way that misrepresents content or origin.

The issue was addressed and fixed in Firefox versions 150, Firefox ESR 115.35, and Firefox ESR 140.10.

Impact Analysis

This spoofing vulnerability could allow attackers to trick users by displaying misleading or falsified web content, potentially leading to phishing attacks or other forms of social engineering.

Mitigation Strategies

To mitigate this vulnerability, update Firefox to version 150 or later, or update Firefox ESR to versions 115.35 or 140.10 or later where the issue has been fixed.

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