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CVE-2026-8706— Sensitive user data could be leaked to other applications through Reader mode

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是美国Mozilla基金会的一款开源Web浏览器。 Mozilla Firefox 151.0之前版本存在信息泄露漏洞，该漏洞源于Reader模式托管在未认证的本地Web服务器上，可能导致其他应用请求任意URL并接收响应。

AI Predicted 8.1 Difficulty: Moderate EPSS 0.23% · P13

Possible ATT&CK Techniques 1 AI

T1001 · Data Obfuscation

Affected Version Matrix 1

VendorProduct Version RangeStatus
Mozilla Firefox for iOS 151.0≤ * unaffected
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I. Basic Information for CVE-2026-8706

Vulnerability Information
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Vulnerability Title
Sensitive user data could be leaked to other applications through Reader mode
Source: CVE Program / CVE List V5
Vulnerability Description
Firefox for iOS hosted Reader mode on an unauthenticated local web server, allowing another application on the same device to request arbitrary URLs and receive the response rendered with the signed-in user's cookies. This vulnerability was fixed in Firefox for iOS 151.0.
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 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox是美国Mozilla基金会的一款开源Web浏览器。 Mozilla Firefox 151.0之前版本存在信息泄露漏洞，该漏洞源于Reader模式托管在未认证的本地Web服务器上，可能导致其他应用请求任意URL并接收响应。
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 151.0 ~ * -

II. Public POCs for CVE-2026-8706

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III. Intelligence Information for CVE-2026-8706

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Vendor Advisories for CVE-2026-8706 (1)

Same Patch Batch · Mozilla · 2026-05-19 · 32 CVEs total

CVE-2026-8960 Spoofing issue in WebExtensions
CVE-2026-8975 Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151
CVE-2026-8974 Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151
CVE-2026-8973 Memory safety bugs fixed in Firefox 151
CVE-2026-8972 Privilege escalation in the WebRTC: Audio/Video component
CVE-2026-8971 Same-origin policy bypass in the Networking: JAR component
CVE-2026-8970 Privilege escalation in the Security component
CVE-2026-8969 Mitigation bypass in the DOM: Security component
CVE-2026-8968 Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component
CVE-2026-8967 Information disclosure in the Graphics: WebGPU component
CVE-2026-8966 Information disclosure in the IP Protection component
CVE-2026-8965 Information disclosure in the DOM: Security component
CVE-2026-8964 Spoofing issue in the Popup Blocker component
CVE-2026-8963 Spoofing issue in the Web Speech component
CVE-2026-8962 Mitigation bypass in the DOM: Security component
CVE-2026-8961 Spoofing issue in the Form Autofill component
CVE-2026-8945 Sandbox escape in Firefox and Firefox Focus for Android
CVE-2026-8959 Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component
CVE-2026-8958 Information disclosure, sandbox escape in the Security: Process Sandboxing component
CVE-2026-8957 Privilege escalation in the Enterprise Policies component

Showing top 20 of 32 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Firefox for iOS
Same vendor: Mozilla

V. Comments for CVE-2026-8706

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