Two critical memory-corruption remote code execution (RCE) vulnerabilities, collectively dubbed PHP2Shell, have been disclosed in core PHP, the underlying engine powering a vast portion of the web. The CrowdStrike Falcon® platform provides out-of-the-box visibility and detection coverage for post-exploitation activities of both vulnerabilities. Tracked as CVE-2026-109618 and CVE-2026-109619, both vulnerabilities carry a CVSS 4.0 score of 9.2 (Critical) and are classified as CWE-824: Access of Uninitialized Pointer. Both allow an unauthenticated remote attacker to execute arbitrary system commands on an affected web server over HTTP. The two issues share a single root cause. When PHP encounters a fatal condition (exhausting its configured memory_limit, exceeding the maximum execution time,…