CVE-2026-13356: Vulnerability in Mozilla Firefox for iOS
CVE-2026-13356 is a vulnerability in Mozilla Firefox for iOS where a malicious webpage can interrupt a pending navigation by enqueuing a synchronous JavaScript dialog. This causes the browser's address bar to display the destination origin while the content rendered is attacker-controlled. The issue was fixed in Firefox for iOS version 152.3. The impact is considered moderate.
AI Analysis
Technical Summary
This vulnerability allows a malicious webpage to disrupt the normal navigation flow in Firefox for iOS by inserting a synchronous JavaScript dialog during a pending navigation. As a result, the browser UI shows the destination origin in the address bar, but the content rendered remains controlled by the attacker, potentially misleading users about the actual site they are viewing. This issue was addressed and fixed in Firefox for iOS version 152.3 as per Mozilla's security advisory MFSA 2026-65.
Potential Impact
The vulnerability can cause address bar origin spoofing, where the browser displays a legitimate destination URL while rendering attacker-controlled content. This can mislead users into trusting malicious content, potentially facilitating phishing or other social engineering attacks. The impact is rated moderate by Mozilla.
Mitigation Recommendations
Mozilla fixed this vulnerability in Firefox for iOS version 152.3. Users and administrators should update to Firefox for iOS 152.3 or later to remediate this issue. No other mitigation or temporary workaround is indicated by the vendor advisory.
CVE-2026-13356: Vulnerability in Mozilla Firefox for iOS
Description
CVE-2026-13356 is a vulnerability in Mozilla Firefox for iOS where a malicious webpage can interrupt a pending navigation by enqueuing a synchronous JavaScript dialog. This causes the browser's address bar to display the destination origin while the content rendered is attacker-controlled. The issue was fixed in Firefox for iOS version 152.3. The impact is considered moderate.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability allows a malicious webpage to disrupt the normal navigation flow in Firefox for iOS by inserting a synchronous JavaScript dialog during a pending navigation. As a result, the browser UI shows the destination origin in the address bar, but the content rendered remains controlled by the attacker, potentially misleading users about the actual site they are viewing. This issue was addressed and fixed in Firefox for iOS version 152.3 as per Mozilla's security advisory MFSA 2026-65.
Potential Impact
The vulnerability can cause address bar origin spoofing, where the browser displays a legitimate destination URL while rendering attacker-controlled content. This can mislead users into trusting malicious content, potentially facilitating phishing or other social engineering attacks. The impact is rated moderate by Mozilla.
Mitigation Recommendations
Mozilla fixed this vulnerability in Firefox for iOS version 152.3. Users and administrators should update to Firefox for iOS 152.3 or later to remediate this issue. No other mitigation or temporary workaround is indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-06-25T17:23:02.121Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-65/","vendor":"Mozilla"}]
Threat ID: 6a4c3c1d27e9c797196d1e50
Added to database: 07/06/2026, 23:37:01 UTC
Last enriched: 07/06/2026, 23:51:33 UTC
Last updated: 07/07/2026, 00:01:08 UTC
Views: 4
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