CVE-2026-6750
Privilege escalation in Firefox WebRender; fixed in FF 150/ESR 115.35+.
Is CVE-2026-6750 being exploited?
Not confirmed. CVE-2026-6750 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 0.48% probability of exploitation in the next 30 days.
How severe is CVE-2026-6750?
CVE-2026-6750 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-2026-6750?
Yes. A fix has been recorded for CVE-2026-6750. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-6750 affect?
CVE-2026-6750 affects Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and 1 further product or version. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-6750?
Upgrade to Firefox 150 / ESR 115.35+ or Thunderbird 150 / 140.10+
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local privilege escalation within the browser process via WebRender; could lead to higher privileges in user context.
Patch when possible