CVE-2026-81267

Stalled popup navigation could allow address bar origin spoofing in Firefox for iOS

Published Aug 31, 2026 CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Description
A malicious webpage could stall a popup's cross-origin navigation after commit, causing the address bar to display the destination origin while continuing to render attacker-controlled content. This vulnerability was fixed in Firefox for iOS 155.0.

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
First Time appeared Mozilla firefox Mobile
CPEs cpe:2.3:a:mozilla:firefox_mobile:*:*:*:*:*:iphone_os:*:*
Vendors & Products Mozilla firefox Mobile
Type Values Removed Values Added
Weaknesses CWE-451
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L'}

ssvc

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

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
Description A malicious webpage could stall a popup's cross-origin navigation after commit, causing the address bar to display the destination origin while continuing to render attacker-controlled content. This vulnerability was fixed in Firefox for iOS 155.0.
Title Stalled popup navigation could allow address bar origin spoofing in Firefox for iOS
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mozilla
Published
Updated
Aug 31, 2026, 8:09 PM
Reserved
Aug 26, 2026, 5:08 PM
Status
Analyzed
Published
Aug 31, 2026, 8:17 PM
Modified
Sep 3, 2026, 5:14 PM