Chrome is a widely used browser; sandbox-escape RCE risks enterprise endpoints and data, warranting broad IT notification.
CVE-2026-84349
Use-after-free in Chrome allows code execution outside sandbox via crafted HTML.
Is CVE-2026-84349 being exploited?
Not confirmed. CVE-2026-84349 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 0.25% probability of exploitation in the next 30 days.
How severe is CVE-2026-84349?
CVE-2026-84349 is rated High with a CVSS score of 8.3. 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-2026-84349?
Yes. A fix has been recorded for CVE-2026-84349. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-84349 affect?
CVE-2026-84349 affects Google Chrome < 152.0.7977.75 (Desktop: Windows, macOS, Linux). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-84349?
Update Chrome to 152.0.7977.75 or later immediately
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote arbitrary code execution outside Chrome sandbox via crafted HTML when renderer is compromised, enabling host-level code execution.
Immediate action required
- affected< 152.0.7977.75
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.