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4.0 Medium

CVE-2025-10859 Cookie storage for non-HTML temporary documents was being shared incorrectly with normal browsing content, allowing…

Description

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.

Affected products and versions

Product Affected versions Fixed in
Firefox for iOS 143.1 earliest → < 143.1 143.1

References

Timeline

  1. Published
  2. Last modified
The 60 CVEs of Firefox for iOS →
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