Arctic Wolf Labs: Finding, Prioritizing, and Patching PHP2Shell Exposure
On Tuesday, October 20, threat actors gained advance visibility into two critical PHP vulnerabilities after details leaked ahead of the planned disclosure, accelerating the race between defenders and attackers. The flaws are tracked as Common Vulnerabilities and Exposures (CVE) identifiers CVE-2026-109618 and CVE-2026-109619. Together they’re known as PHP2Shell. Both carry a 9.2 rating on the Common Vulnerability Scoring System (CVSS) version 4.0 scale.