CVE-2025-10859
Data stored in cookies for non-HTML content while browsing Incognito could be viewed after closing private tabs
Vexday Risk Score
13Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 4EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
30 Sep 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected products
Mozilla · Firefox for iOSWant to know if your infrastructure is exposed to this?
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