Mozilla Firefox for iOS Information Disclosure Vulnerability

Mozilla Firefox for iOS is a web browser designed for iOS devices by the US-based Mozilla Foundation. An information disclosure vulnerability exists in Mozilla Firefox for iOS, which is caused due to incorrect sharing of cookie storage for non-HTML temporary documents with normal browsing content...

CVE-2025-10859

Cookie storage for non-HTML temporary documents was being shared incorrectly with normal browsing content, allowing information from private tabs to escape Incognito mode even after the user closed all tabs This vulnerability affects Firefox for iOS 143.1...

CVE-2025-10859

Cookie storage for non-HTML temporary documents was being shared incorrectly with normal browsing content, allowing information from private tabs to escape Incognito mode even after the user closed all tabs. This vulnerability was fixed in Firefox for iOS 143.1...

CVE-2025-10859

Cookie storage for non-HTML temporary documents was being shared incorrectly with normal browsing content, allowing information from private tabs to escape Incognito mode even after the user closed all tabs. This vulnerability was fixed in Firefox for iOS 143.1...

CVE-2025-10859 Data stored in cookies for non-HTML content while browsing Incognito could be viewed after closing private tabs

Cookie storage for non-HTML temporary documents was being shared incorrectly with normal browsing content, allowing information from private tabs to escape Incognito mode even after the user closed all tabs. This vulnerability was fixed in Firefox for iOS 143.1...

CVE-2025-10859

Cookie storage for non-HTML temporary documents was being shared incorrectly with normal browsing content, allowing information from private tabs to escape Incognito mode even after the user closed all tabs. This vulnerability was fixed in Firefox for iOS 143.1...

PT-2025-39982

Name of the Vulnerable Software and Affected Versions Firefox for iOS versions prior to 143.1 Description A flaw existed in how Firefox for iOS handled cookie storage for non-HTML temporary documents. This resulted in incorrect sharing of cookie storage between non-HTML temporary documents and...