Access Control Bypass Affecting Firefox package, versions [,151.0.0)
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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Start learning- Snyk IDSNYK-UNMANAGED-FIREFOX-16761518
- published20 May 2026
- disclosed19 May 2026
- creditDaisuke Hatakeyama
Introduced: 19 May 2026
CVE-2026-8945 (opens in a new tab)How to fix?
Upgrade Firefox to version 151.0.0 or higher.
Overview
Affected versions of this package are vulnerable to Access Control Bypass through the browser sandbox implementation. An attacker can execute code outside of the intended sandbox environment by exploiting insufficient isolation between the sandboxed process and the host system.