User Impersonation Affecting Firefox package, versions [,149.0.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published24 Mar 2026
- disclosed24 Mar 2026
- creditAswinkumar Gokulakannan
Introduced: 24 Mar 2026
CVE-2026-4728 (opens in a new tab)How to fix?
Upgrade Firefox to version 149.0.0 or higher.
Overview
Affected versions of this package are vulnerable to User Impersonation via the Privacy: Anti-Tracking component. An attacker can deceive users or systems by presenting false information or impersonating trusted entities through manipulation of anti-tracking mechanisms.