CVE-2025-10859— Data stored in cookies for non-HTML content while browsing Incognito could be viewed after closing private tabs
Quick assessment
Affected
Mozilla Firefox for iOS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Mozilla Firefox for iOS是美国Mozilla基金会的一款针对iOS设备设计的网页浏览器。 Mozilla Firefox for iOS 143.1之前版本存在安全漏洞，该漏洞源于非HTML临时文档的Cookie存储与正常浏览内容共享不当，可能导致信息泄露。
Possible ATT&CK Techniques 1 AI
T1005 · Data from Local System
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I. Basic Information for CVE-2025-10859
Vulnerability Information
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Vulnerability Title
Data stored in cookies for non-HTML content while browsing Incognito could be viewed after closing private tabs
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Mozilla Firefox for iOS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox for iOS是美国Mozilla基金会的一款针对iOS设备设计的网页浏览器。 Mozilla Firefox for iOS 143.1之前版本存在安全漏洞，该漏洞源于非HTML临时文档的Cookie存储与正常浏览内容共享不当，可能导致信息泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Mozilla | Firefox for iOS | 143.1 ~ * | - |
|
II. Public POCs for CVE-2025-10859
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2025-10859 (1)
Same Patch Batch · Mozilla · 2025-09-30 · 3 CVEs total
| CVE-2025-11153 | JIT miscompilation in the JavaScript Engine: JIT component | |
| CVE-2025-11152 | Sandbox escape due to integer overflow in the Graphics: Canvas2D component |
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V. Comments for CVE-2025-10859
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