Missing Authentication for Critical Function in Firefox for iOS - CVE-2026-8706
Published: May 19, 2026
Vulnerability identifier: #VU131870
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-8706
CWE-ID: CWE-306
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Mozilla
Affected software:
Firefox for iOS
Firefox for iOS
Detailed vulnerability description
The vulnerability allows a local application to disclose sensitive information.
The vulnerability exists due to improper access control in Reader mode's local web server when handling requests from another application on the same device. A local application installed on the device can send requests for arbitrary URLs and receive the response rendered with the signed-in user's cookies.
How to mitigate CVE-2026-8706
Install security update from vendor's website.