CVE-2026-2919: Vulnerability in Mozilla Focus for iOS
Malicious scripts could display attacker-controlled web content under spoofed domains in Focus for iOS by stalling a _self navigation to an invalid port and triggering an iframe redirect, causing the UI to display a trusted domain without user interaction. This vulnerability was fixed in Focus for iOS 148.2.
AI Analysis
Technical Summary
This vulnerability in Mozilla Focus for iOS involves a UI spoofing issue where attacker-controlled content can be displayed under spoofed domains. The attack leverages stalling a _self navigation to an invalid port combined with an iframe redirect to cause the browser UI to display a trusted domain, misleading users without requiring their interaction. The flaw is classified under CWE-451 (Error Handling). Mozilla addressed this vulnerability in Focus for iOS version 148.2, as detailed in their security advisory MFSA 2026-18.
Potential Impact
The vulnerability allows an attacker to cause the browser UI to display attacker-controlled content under the guise of a trusted domain, potentially misleading users. The CVSS score of 4.3 reflects a medium severity with no direct impact on confidentiality or availability, but a limited impact on integrity due to UI spoofing. There are no known exploits in the wild at this time.
Mitigation Recommendations
A fix for this vulnerability is available in Mozilla Focus for iOS version 148.2. Users and administrators should update to this version to remediate the issue. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-2919: Vulnerability in Mozilla Focus for iOS
Description
Malicious scripts could display attacker-controlled web content under spoofed domains in Focus for iOS by stalling a _self navigation to an invalid port and triggering an iframe redirect, causing the UI to display a trusted domain without user interaction. This vulnerability was fixed in Focus for iOS 148.2.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Mozilla Focus for iOS involves a UI spoofing issue where attacker-controlled content can be displayed under spoofed domains. The attack leverages stalling a _self navigation to an invalid port combined with an iframe redirect to cause the browser UI to display a trusted domain, misleading users without requiring their interaction. The flaw is classified under CWE-451 (Error Handling). Mozilla addressed this vulnerability in Focus for iOS version 148.2, as detailed in their security advisory MFSA 2026-18.
Potential Impact
The vulnerability allows an attacker to cause the browser UI to display attacker-controlled content under the guise of a trusted domain, potentially misleading users. The CVSS score of 4.3 reflects a medium severity with no direct impact on confidentiality or availability, but a limited impact on integrity due to UI spoofing. There are no known exploits in the wild at this time.
Mitigation Recommendations
A fix for this vulnerability is available in Mozilla Focus for iOS version 148.2. Users and administrators should update to this version to remediate the issue. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-02-20T22:12:39.140Z
- Cvss Version
- null
- State
- PUBLISHED
Threat ID: 69aed0ab2904315ca30d0a91
Added to database: 3/9/2026, 1:52:43 PM
Last enriched: 4/14/2026, 12:07:37 PM
Last updated: 4/25/2026, 12:58:21 AM
Views: 166
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