Universal browser (Google Chrome) RCE that escapes the sandbox on Windows; affects large user base and requires urgent, organization-wide mitigation.
CVE-2026-103626
Chrome (Windows) RCE escaping sandbox via crafted HTML and social engineering.
Is CVE-2026-103626 being exploited?
Not confirmed. CVE-2026-103626 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-2026-103626?
CVE-2026-103626 is rated Critical with a CVSS score of 9.6. 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-2026-103626?
Yes. A fix has been recorded for CVE-2026-103626. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-103626 affect?
CVE-2026-103626 affects Google Chrome on Windows prior to 154.0.8037.97. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-103626?
Update Chrome to 154.0.8037.97 or later immediately; enforce auto-updates.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution outside Chrome sandbox on Windows via crafted HTML and social engineering, enabling arbitrary code execution on host.
Immediate action required