Privilege Escalation Vulnerability in Firefox for iOS by Mozilla
CVE-2026-121842

Currently unrated

Key Information:

Vendor

Mozilla
Status
Firefox For iOS
Vendor
CVE Published:
9 November 2026

What is CVE-2026-121842?

A privilege escalation vulnerability exists in the Reader View component of Firefox for iOS. This issue could allow an attacker to manipulate the privileges of the application, potentially leading to unauthorized access or control over sensitive resources. Mozilla has addressed this flaw in the release of Firefox for iOS version 160.0, ensuring that users benefit from improved security and protection against potential threats.

Affected Version(s)

Firefox for iOS 160.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2076233
https://www.mozilla.org/security/advisories/mfsa2026-124/

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

navapon
.