CVE-2026-121842

Privilege escalation in the Reader View component in Firefox for iOS

Published Nov 9, 2026 CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Description
Privilege escalation in the Reader View component in Firefox for iOS. This vulnerability was fixed in Firefox for iOS 160.0.

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
Metrics ssvc

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

Type Values Removed Values Added
Weaknesses CWE-285
Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox For Ios
Vendors & Products Mozilla
Mozilla firefox For Ios
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
Description Privilege escalation in the Reader View component in Firefox for iOS. This vulnerability was fixed in Firefox for iOS 160.0.
Title Privilege escalation in the Reader View component in Firefox for iOS
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mozilla
Published
Updated
Nov 10, 2026, 4:55 AM
Reserved
Nov 4, 2026, 7:47 AM
Status
Deferred
Published
Nov 9, 2026, 2:17 PM
Modified
Nov 10, 2026, 4:27 PM