— Unscored

PHP Memory Corruption Vulnerability

CVE-2026-109618 Exploited

PHP contains an out-of-memory corruption vulnerability that allows for unauthenticated remote code execution.

Being exploited in the wild

Catalogued 26 October 2026 · US federal remediation deadline 29 October 2026

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for…

Exploit code is also public: Exploit-DB · Public PoC · Nuclei template

Exploit-DBPHP2Shell (CVE-2026-109618) - PHP core versions after v5.4 - RCE
NucleiPHP2Shell (CVE-2026-109618/CVE-2026-109619) - Active Crash Detection
Public PoCikow/php2shell-poc1,918 stars
Public PoCeness/php2shell-CVE-2026-109618-CVE-2026-109619-PoC1,053 stars
Public PoCassetnote/php2shell-scanner969 stars
Public PoCdevploit/php2shell239 stars
Public PoCJoasASantos/php2shell-exploit193 stars
Public PoCHOSTED-POWER/php_uploadprogress_guard174 stars
Public PoCsyrex1013/php2shell150 stars
Public PoCjunaire/CVE-2026-109618-exploit142 stars

Assessment

CVSS: Not yet scored
Severity: Unscored
Known exploited: Yes — listed in the CISA KEV catalog
Exploit availability: CISA KEV, Exploit-DB, Public PoC, Nuclei template
Published: 26 October 2026
Last updated: 26 October 2026
Affected: PHP Group · PHP
Weakness: CWE-1325, CWE-1419, CWE-416, CWE-755, CWE-824

At the source

CISA KEV

References

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