Access Control Bypass Affecting Firefox package, versions [,150.0)
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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- published26 Apr 2026
- disclosed21 Apr 2026
- creditlebr0nli
Introduced: 21 Apr 2026
CVE-2026-6774 (opens in a new tab)How to fix?
Upgrade Firefox to version 150.0 or higher.
Overview
Affected versions of this package are vulnerable to Access Control Bypass due to insufficient enforcement of security controls in the DOM: Security component. An attacker can gain unauthorized access to restricted resources or perform actions beyond intended permissions by bypassing implemented mitigations.