PHP2Shell security flaws now sucessfully exploited in the wild
Two critical RCE vulnerabilities in PHP2Shell are now being exploited in the wild.
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Summary
Two critical RCE vulnerabilities, collectively tracked as PHP2Shell (CVE-2026-109618 and CVE-2026-109619), have been confirmed to be exploited in the wild against Apache mod_php installations running PHP 8.4.26. While initial exploitation attempts were limited to scanning and non-working exploits, recent activity shows successful remote code execution with memory disclosure. The PHP security team has released patches for these flaws.
The lesson from this incident
Full lessonTwo critical remote code execution vulnerabilities in PHP 8.4.26 (CVE-2026-109618 and CVE-2026-109619) have moved from theoretical risk to confirmed in-the-wild exploitation, including memory disclosure, despite patches being available from the PHP security team. The root cause is straightforward: organisations running Apache mod_php installations failed to apply available security fixes before threat actors weaponised working exploits. This pattern — where initial scanning activity escalates to successful exploitation — is a well-documented threat actor playbook that relies on defender inertia. The fact that patches existed at the time of confirmed exploitation means every affected organisation that was breached could have avoided the incident entirely through timely patch deployment. This matters because RCE with memory disclosure can cascade into credential theft, lateral movement, and full infrastructure compromise.
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Indicators of Compromise
- cve — CVE-2026-109618
- cve — CVE-2026-109619
- cve — CVE-2026-115560