UI Manipulation Vulnerability in Firefox for iOS by Mozilla
CVE-2026-116631

5.4MEDIUM

Key Information:

Vendor

Mozilla
Status
Firefox For iOS
Vendor
CVE Published:
26 October 2026

What is CVE-2026-116631?

A vulnerability exists in Firefox for iOS that allows a malicious web page to manipulate the user interface. When a user visits a compromised page, it can open a telephone link that appears to originate from another website, misleading users into believing that the call was requested by that site. This could lead to unauthorized call activations, potentially compromising user privacy. The issue has been addressed in version 156.1 of Firefox for iOS.

Affected Version(s)

Firefox for iOS 156.1

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1297353
https://www.mozilla.org/security/advisories/mfsa2026-117/

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Yuyang Zhou
.