Google Chrome is a widely used browser; a remote code execution bug affecting many endpoints warrants broad IT notification.
CVE-2026-118336
High-severity Chrome headless input validation RCE (pre-156.0.8078.73)
Is CVE-2026-118336 being exploited?
Not confirmed. CVE-2026-118336 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-2026-118336?
CVE-2026-118336 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-2026-118336?
Yes. A fix has been recorded for CVE-2026-118336. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-118336 affect?
CVE-2026-118336 affects Google Chrome (desktop) prior to 156.0.8078.73. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-118336?
Update Chrome to 156.0.8078.73 or later on all endpoints and ensure auto-update is enabled.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote arbitrary code execution inside Chrome sandbox via a crafted HTML page, enabling code execution and potential system compromise.
Patch when possible
- affected< 156.0.8078.73
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.