CVE-2026-84127

Information disclosure in the WebExtensions component in Firefox for Android

Published Sep 1, 2026 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Description
Information disclosure in the WebExtensions component in Firefox for Android. This vulnerability was fixed in Firefox 155.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Mozilla firefox Mobile
CPEs cpe:2.3:a:mozilla:firefox_mobile:*:*:*:*:*:android:*:*
Vendors & Products Mozilla firefox Mobile
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N'}

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Weaknesses CWE-200
Vendors & Products Mozilla
Mozilla firefox
Type Values Removed Values Added
Description Information disclosure in the WebExtensions component in Firefox for Android. This vulnerability was fixed in Firefox 155.
Title Information disclosure in the WebExtensions component in Firefox for Android
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mozilla
Published
Updated
Sep 1, 2026, 2:59 PM
Reserved
Sep 1, 2026, 7:25 AM
Status
Analyzed
Published
Sep 1, 2026, 1:20 PM
Modified
Sep 3, 2026, 1:00 PM
Severity
Moderate
Public date
Sep 1, 2026, 12:18 PM