Affects widely used Mozilla Firefox/Thunderbird; a browser privilege-escalation/sandbox-escape bug can impact many organizations and merits broad notification.
CVE-2026-92010
Firefox/Thunderbird CanvasWebGL boundary bug allows privilege escalation
Is CVE-2026-92010 being exploited?
Not confirmed. CVE-2026-92010 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.
How severe is CVE-2026-92010?
CVE-2026-92010 is rated High with a CVSS score of 8.8. 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-2026-92010?
Yes. A fix has been recorded for CVE-2026-92010. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-92010 affect?
CVE-2026-92010 affects Mozilla Firefox <156, Firefox ESR <115.41, Firefox ESR <140.16, Firefox ESR <153.3, and 3 further products or versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-92010?
Update to Firefox 156 or listed ESR/Thunderbird fixed versions immediately.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Crafted WebGL/canvas content can trigger sandbox escape and elevate privileges, enabling code execution or greater system access.
Patch when possible