Widely-used Chrome browser; exploit could allow RCE on endpoints across organizations; high risk to enterprise devices.
CVE-2026-4680
Chrome FedCM use-after-free enables RCE via crafted HTML page.
Is CVE-2026-4680 being exploited?
Not confirmed. CVE-2026-4680 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 0.42% probability of exploitation in the next 30 days.
How severe is CVE-2026-4680?
CVE-2026-4680 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-2026-4680?
Yes. A fix has been recorded for CVE-2026-4680. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-4680 affect?
CVE-2026-4680 affects Google Chrome (Desktop & Mobile) < 146.0.7680.165. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-4680?
Update to 146.0.7680.165 or newer
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
RCE in Chrome sandbox via crafted HTML page abusing FedCM; attacker can run arbitrary code on user device.
Patch when possible
- affected< 146.0.7680.165
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.