CVE-2025-10859
Data stored in cookies for non-HTML content while browsing Incognito could be viewed after closing private tabs
- State
- Published
- Severity
- 4.0 Medium
- Published
- Sep 30, 2025
- Updated
- Apr 13, 2026
- Reserved
- Sep 22, 2025
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.0 Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N | CISA-ADP |
Weaknesses
- CWE-359 Exposure of Private Personal Information to an Unauthorized Actor
Affected Products
| Product | Versions |
|---|---|
Firefox for iOSMozilla |
|
References
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