Affects widely deployed Google Chrome; RCE via crafted extensions can impact enterprise endpoints and requires org-wide remediation.
CVE-2026-17778
Use-after-free in Chrome Extensions enabling remote code execution via crafted extension
Is CVE-2026-17778 being exploited?
Not confirmed. CVE-2026-17778 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 0.44% probability of exploitation in the next 30 days.
How severe is CVE-2026-17778?
CVE-2026-17778 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-2026-17778?
Yes. A fix has been recorded for CVE-2026-17778. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-17778 affect?
CVE-2026-17778 affects Google Chrome <151.0.7922.72 on Windows, Google Chrome <151.0.7922.72 on macOS, Google Chrome <151.0.7922.72 on Linux. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-17778?
Update Chrome to 151.0.7922.72+; remove untrusted extensions and monitor endpoints
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution in Chrome via crafted extension; attacker can run arbitrary code in the browser sandbox, access user data, and potentially escalate with additional bugs.
Patch when possible
- affected< 151.0.7922.72
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.