CVE-2026-74971
Received Received - Intake

DOM-Based Information Disclosure in Firefox

Publication date: 2026-08-18

Last updated on: 2026-08-18

Assigner: Mozilla Corporation

Description
Information disclosure in the DOM: UI Events & Focus Handling component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1.

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Meta Information

Published
2026-08-18
Last Modified
2026-08-18
Generated
2026-08-18
AI Q&A
2026-08-18
EPSS Evaluated
N/A
NVD
CVE-2026-74971
EUVD
EUVD-2026-60666

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
mozilla firefox 154
mozilla firefox_esr 140.14
mozilla firefox_esr 153.1

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

CVE-2026-74971 is an information disclosure vulnerability in the DOM: UI Events & Focus Handling component of Firefox and Firefox ESR. It allows unauthorized access to sensitive user interface or focus-related data under certain conditions.

Detection Guidance

This vulnerability affects Firefox ESR versions before 140.14, 153.1, and Firefox versions before 154. To detect it, check installed Firefox versions using commands like 'firefox --version' or 'apt list --installed | grep firefox' on Linux. Compare versions against the fixed releases.

Impact Analysis

This vulnerability could allow attackers to access sensitive UI or focus-related data, potentially exposing private information like form inputs, active elements, or navigation details without user consent.

Compliance Impact

The vulnerability allows unauthorized access to sensitive user interface or focus-related data, which could lead to exposure of personal or confidential information. This may impact compliance with GDPR (data protection) and HIPAA (healthcare data privacy) by increasing the risk of data breaches or unauthorized disclosures.

Mitigation Strategies

Update Firefox to version 154 or later, Firefox ESR to version 140.14 or later, or Firefox ESR to version 153.1 or later to address the vulnerability.

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