CVE-2026-2919
UI Spoofing in Focus for iOS via Navigation Stall and Iframe Redirect
Publication date: 2026-03-09
Last updated on: 2026-05-06
Assigner: Mozilla Corporation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mozilla | firefox_focus | to 148.2 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-451 | The user interface (UI) does not properly represent critical information to the user, allowing the information - or its source - to be obscured or spoofed. This is often a component in phishing attacks. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability in Focus for iOS versions before 148.2 allows attacker-controlled web content to be displayed under spoofed domains. It happens by stalling a _self navigation to an invalid port and then triggering an iframe redirect. This causes the user interface to show a trusted domain without any user interaction, potentially misleading users.
How can this vulnerability impact me? :
[{'type': 'paragraph', 'content': "The vulnerability can mislead users into trusting malicious content because the browser UI displays a trusted domain even though the content is attacker-controlled. This can lead to phishing attacks, data theft, or other malicious activities by exploiting the user's trust in the displayed domain."}] [1]
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, you should update Focus for iOS to version 148.2 or later, where the issue has been fixed.