High-severity mitigation bypass in a widely deployed browser (Firefox). Can enable code execution or local-file access via crafted content, requiring org-wide patching and rapid distribution.
CVE-2026-106016
Mitigation bypass in Firefox file handling (fixed in 157.0.1).
Is CVE-2026-106016 being exploited?
Not confirmed. CVE-2026-106016 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.32% probability of exploitation in the next 30 days.
How severe is CVE-2026-106016?
CVE-2026-106016 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-106016?
Yes. A fix has been recorded for CVE-2026-106016. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-106016 affect?
CVE-2026-106016 affects Mozilla Firefox < 157.0.1. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-106016?
Update Firefox to 157.0.1 immediately; block untrusted content; audit endpoints.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Mitigation bypass in file handling may allow remote attackers to execute code or access local files via crafted web content.
Immediate action required