CVE-2026-109619
PHP has various global state that temporarily points into request memory. In some scenarios, global state may not be correctly reset, or may be repopulated after being reset. The global state may then refer to request memory even after it has been freed. Subsequent requests may read or branch on this stale state before it is fully initialized. Multiple strategies can trigger this condition and produce remote code execution (RCE).
- Score
- CVSS 4.0 9.2 Critical
- Status
- Analyzed - security@php.net
- Published
- 2026-10-21
- Last modified
- 2026-10-28
- Known exploited (CISA KEV)
- since 2026-10-26, action due 2026-10-29: 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 evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
- Weaknesses
- CWE-1325, CWE-1419, CWE-416, CWE-755, CWE-824
Affected products
- Pan-os (Paloaltonetworks)
- Panorama Virtual Appliance (Paloaltonetworks)
- Php (Php)
- Php (Php Group)
- Ruggedcom Ape1808 (Siemens)
- Ruggedcom Ape1808 Firmware (Siemens)
References
- https://github.com/php/php-src/security/advisories/GHSA-6wmf-4rv5-p3rp
- https://www.wiz.io/blog/php2shell-php-rce
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-109619
- https://php2shell.delftintellab.com/
- https://arcticwolf.com/resources/blog/php2shell-critical-php-vulnerabilities-enable-unauthenticated-remote-code-executi…
- http://www.openwall.com/lists/oss-security/2026/10/21/7
- http://www.openwall.com/lists/oss-security/2026/10/21/16
- http://www.openwall.com/lists/oss-security/2026/10/21/17
- http://www.openwall.com/lists/oss-security/2026/10/21/23
- http://www.openwall.com/lists/oss-security/2026/10/22/2
- http://www.openwall.com/lists/oss-security/2026/10/22/14
- http://www.openwall.com/lists/oss-security/2026/10/22/15
- http://www.openwall.com/lists/oss-security/2026/10/22/16
- http://www.openwall.com/lists/oss-security/2026/10/22/19
- http://www.openwall.com/lists/oss-security/2026/10/22/20
- http://www.openwall.com/lists/oss-security/2026/10/23/4
- https://cert-portal.siemens.com/productcert/html/ssa-566512.html
