Widely-used Chrome browser vulnerability with high impact; could disrupt endpoints across industries if exploited.
CVE-2026-14040
Use-after-free in BrowserTag enables heap corruption via malicious Chrome extension.
Is CVE-2026-14040 being exploited?
Not confirmed. CVE-2026-14040 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 0.26% probability of exploitation in the next 30 days.
How severe is CVE-2026-14040?
CVE-2026-14040 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-2026-14040?
Yes. A fix has been recorded for CVE-2026-14040. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-14040 affect?
CVE-2026-14040 affects Google Chrome Desktop (<150.0.7871.47) on Windows/macOS/Linux. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-14040?
Update Chrome to the latest version immediately
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Heap corruption in BrowserTag via crafted extension; potential Chrome process RCE or crash.
Immediate action required
- affected< 150.0.7871.47
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.