SB2026051954 - Information disclosure in Firefox for iOS
Published: May 19, 2026
Security Bulletin ID
SB2026051954
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Missing Authentication for Critical Function (CVE-ID: CVE-2026-8706)
CWE-ID: CWE-306 - Missing Authentication for Critical Function
CVSSv4: 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
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.
Remediation
Install update from vendor's website.