Affects Google Chrome (V8); high-severity RCE risk; widely used browser across industries.
CVE-2026-3543
Chrome V8 memory out-of-bounds via crafted HTML page.
Is CVE-2026-3543 being exploited?
Not confirmed. CVE-2026-3543 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 0.29% probability of exploitation in the next 30 days.
How severe is CVE-2026-3543?
CVE-2026-3543 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-2026-3543?
Yes. A fix has been recorded for CVE-2026-3543. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-3543 affect?
CVE-2026-3543 affects Google Chrome <145.0.7632.159, Chromium-based V8. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-3543?
Update Chrome to 145.0.7632.159+
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution via crafted HTML page exploiting V8 memory access (out-of-bounds).
Patch when possible
- affected< 145.0.7632.159
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.