Sentinelone PHP2Shell Vulnerabilities Threaten 70% of Websites with Remote Code Execution
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- •PHP2Shell vulnerabilities affect 70% of websites, allowing remote code execution.
- •CVE-2026-109618 and CVE-2026-109619 were leaked before patches were available.
- •CISA added both CVEs to its Known Exploited Vulnerabilities catalog due to active exploitation.
The PHP2Shell vulnerabilities, identified as CVE-2026-109618 and CVE-2026-109619, pose a critical threat to approximately 70% of websites globally, allowing unauthenticated remote code execution. Discovered by the security firm Calif using AI, these flaws were leaked before a scheduled patch on October 21, 2026, leading to active exploitation attempts. The vulnerabilities affect major platforms like WordPress and Drupal, prompting emergency downtime for numerous organizations, including government sites. CISA added both CVEs to its Known Exploited Vulnerabilities catalog on October 26, 2026. The vulnerabilities are particularly dangerous because they can be triggered during initial HTTP(S) requests, before any authentication mechanisms are engaged. As of now, organizations are urged to apply patches immediately to mitigate risks.
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China-Linked Hackers Exploit PHP2Shell Vulnerabilities to Breach U.S. Government Systems On October 21, 2026, the PHP development team released patches for two critical vulnerabilities in PHP, known as PHP2Shell (CVE-2026-109618 and CVE-2026-109619), which allow unauthenticated remote code execution. These vulnerabilities were actively exploited by a suspected China-linked threat actor who compromised 25… 
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