PHP Group · PHP
CVE-2026-109619
RCE via stale global state
We wrote about this one: PHP2Shell: two critical flaws in PHP
What it is
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).
CISA: PHP contains a stale internal request-state vulnerability that allows for unauthenticated remote code execution.
What to do
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.
Deadline for US federal agencies: October 29, 2026
More exploited flaws from PHP Group
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Oct 26, 2026 | Memory Corruption | PHP | Critical 9.2 | >99.9% |
| Jun 12, 2024 | PHP-CGI OS Command Injection | PHP | Critical 9.8 | >99.9% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.