Critical Security Advisory: PHP2Shell Vulnerabilities Put PHP Environments at Risk

Two critical PHP vulnerabilities, CVE-2026-109618 and CVE-2026-109619, with a reported CVSS score of 9.2, have raised serious security concerns following the release of the public PHP2Shell Proof-of-Concept (PoC) exploit.

Paramount is here to help you safeguard your digital infrastructure with proactive vulnerability assessments, continuous threat monitoring, and expert security guidance.

Here’s what you need to know:

• Remote Code Execution Risk: Attackers may exploit specific vulnerabilities and application weaknesses to execute malicious code.
• Potentially Affected Versions: PHP versions 5.4.0 to 8.5.11 have been flagged by researchers, pending official confirmation.
• Critical Attack Paths: Session-file injection, Local File Inclusion (LFI), memory corruption, and unsafe deserialization may expose vulnerable applications.
• Immediate Security Measures: Audit PHP deployments, review session configurations, and address application-level security weaknesses.
• Patch & Monitor: Verify official PHP security updates, upgrade affected systems, and continuously monitor suspicious server activity.

Stay ahead of emerging cyber threats with Paramount.

Protect. Detect. Respond.

securityadvisory@paramountassure.com