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 a…
Published: 2025-09-30 · CVSS: 4.0 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7