CVE-2026-17920
Use-after-free in V8 allows code execution via a crafted Chrome extension.
Is CVE-2026-17920 being exploited?
Not confirmed. CVE-2026-17920 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 0.22% probability of exploitation in the next 30 days.
How severe is CVE-2026-17920?
CVE-2026-17920 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-2026-17920?
Yes. A fix has been recorded for CVE-2026-17920. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-17920 affect?
CVE-2026-17920 affects Google Chrome <151.0.7922.72, Chromium-based browsers allowing extension installs. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-17920?
Update Chrome to >=151.0.7922.72 and restrict/block untrusted extension installs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Arbitrary code execution inside Chrome's sandbox via a malicious extension installed by a user (CWE-416).
Immediate action required
- 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.