CVE-2026-9308
Firefox for iOS Reader View DOM-based XSS via JSON-LD injection
Publication date: 2026-06-01
Last updated on: 2026-06-01
Assigner: Mozilla Corporation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mozilla | firefox_for_ios | 151.2 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability occurs in Firefox for iOS Reader View, where the page content was replaced in its HTML template before other internal placeholders were substituted. A malicious web page could include a placeholder string that would later be replaced with JSON-LD data, which could lead to arbitrary JavaScript execution.
How can this vulnerability impact me? :
The vulnerability could allow an attacker to execute arbitrary JavaScript code within the context of the affected application. This could lead to unauthorized actions, data theft, or other malicious activities performed by the attacker.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, update Firefox for iOS to version 151.2 or later, where the issue has been fixed.