Is CVE-2026-100807 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-100807?

CVE-2026-100807 has a CVSS v3 severity of HIGH (8.8).

Back

Description

Privilege escalation in the DOM: Service Workers component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.