Chrome is ubiquitous; a remote code execution bug in a widely deployed browser can enable exploit chains and targeted attacks across enterprises and endpoints.
CVE-2026-118343
Chrome ReadingList input validation RCE via crafted HTML (pre-156.0.8078.73)
Is CVE-2026-118343 being exploited?
Not confirmed. CVE-2026-118343 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-2026-118343?
CVE-2026-118343 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-2026-118343?
Yes. A fix has been recorded for CVE-2026-118343. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-118343 affect?
CVE-2026-118343 affects Google Chrome for Desktop < 156.0.8078.73. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-118343?
Update Chrome to 156.0.8078.73 or later immediately
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote attacker can execute arbitrary code inside Chrome's sandbox via a crafted HTML page, enabling code execution, data access or follow-on exploits.
Immediate action required
- affected< 156.0.8078.73
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.