Improper Privilege Management Affecting Firefox package, versions [,149.0)
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
- creditSajeeb Lohani
Introduced: 24 Mar 2026
CVE-2026-4687 (opens in a new tab)How to fix?
Upgrade Firefox to version 149.0 or higher.
Overview
Affected versions of this package are vulnerable to Improper Privilege Management via incorrect boundary conditions in the Telemetry component. An attacker can break out of the sandbox and execute code with elevated privileges by exploiting these boundary checks.