CVE-2026-18397

This vulnerability enables unauthenticated remote code execution (RCE) on a victim's machine by exploiting a combination of cryptographic weaknesses and memory management issues in the SConnect native host component. The attack leverages an unrestricted messaging interface between an attacker-controlled web page and the native host, allowing malicious input to bypass security checks.

  • Published Oct 1, 2026
  • CVSS 9.4 critical
  • 0.3% chance of exploitation in the next 30 days (EPSS)

Affected software

In the news

CVE-2026-18397 at the National Vulnerability Database