CVE-2026-18809

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Information Disclosure in Firefox for Android

Publication date: 2026-08-04

Last updated on: 2026-08-18

Assigner: Mozilla Corporation

Description

Information disclosure in Firefox for Android and Firefox Focus for Android. This vulnerability was fixed in Firefox 153.0.3.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-04

Last Modified

2026-08-18

Generated

2026-08-24

AI Q&A

2026-08-04

EPSS Evaluated

2026-08-23

NVD

CVE-2026-18809

EUVD

EUVD-2026-52667

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	firefox_focus	153.0.3
mozilla	firefox_focus	*
mozilla	firefox	153.0.3

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-200	The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Attack-Flow Graph

Executive Summary

CVE-2026-18809 is an information disclosure vulnerability in Firefox for Android and Firefox Focus for Android. It was fixed in Firefox version 153.0.3. The vulnerability allows unauthorized access to sensitive data.

Detection Guidance

Detection requires checking the installed Firefox for Android version. If the version is below 153.0.3, the system is vulnerable. No specific commands are provided in the resources.

Impact Analysis

This vulnerability could allow attackers to access confidential information stored or transmitted by the affected browsers. Users of Firefox for Android or Firefox Focus for Android might have their data exposed if they do not update to version 153.0.3.

Compliance Impact

The provided CVE data does not specify how this vulnerability affects compliance with standards like GDPR or HIPAA. The vulnerability is an information disclosure issue in Firefox for Android and Firefox Focus for Android, but no details are given about data types exposed or regulatory impacts.

Mitigation Strategies

Update Firefox for Android to version 153.0.3 or later immediately. This can be done through the Google Play Store or Mozilla's official update channels.

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