CRITICAL · CVSS 9.2
ACTIVELY EXPLOITED
PATCH AVAILABLE
CVE-2026-109619: PHP Stale Internal Request-State Vulnerability
| Vendor | PHP Group |
|---|---|
| Product | PHP |
| CVSS score | 9.2 · CVSS 4.0 · CRITICALCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| EPSS | 100.0% (percentile 100) |
| Actively exploited | Yes, according to CISA KEV |
| Added to CISA KEV | 26 Oct 2026 |
| CISA federal deadline | 29 Oct 2026 |
| Weakness (CWE) | CWE-1325, CWE-1419, CWE-416, CWE-755, CWE-824 |
| NVD published | 21 Oct 2026 |
| NVD last modified | 5 Nov 2026 |
| NVD status | Analyzed |
Affected versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Paloaltonetworks Panorama Virtual Appliance | – | – |
| Php Php | from 5.4.0 before 8.2.35 | 8.2.35 |
| Php Php | from 8.3.0 before 8.3.36 | 8.3.36 |
| Php Php | from 8.4.0 before 8.4.27 | 8.4.27 |
| Php Php | from 8.5.0 before 8.5.12 | 8.5.12 |
| Siemens Amis Ts | – | – |
| Siemens Energy Engage | 2.0 | – |
| Siemens Energy Engage | 3.1 | – |
| Siemens Spectrum Power 3 | – | – |
| Siemens Spectrum Power 4 | – | – |
| Siemens Spectrum Power 7 | – | – |
| Siemens Spectrum Power Tg | – | – |
| Paloaltonetworks Pan-Os | from 10.2.0 before 10.2.7 | 10.2.7 |
| Paloaltonetworks Pan-Os | from 11.1.0 before 11.1.4 | 11.1.4 |
| Paloaltonetworks Pan-Os | from 11.2.0 before 11.2.4 | 11.2.4 |
| Paloaltonetworks Pan-Os | from 12.1.0 before 12.1.4 | 12.1.4 |
| Paloaltonetworks Pan-Os | from 12.2.0 before 12.2.4 | 12.2.4 |
| Paloaltonetworks Pan-Os | – | – |
| Paloaltonetworks Pan-Os | 10.2.10 | – |
| Paloaltonetworks Pan-Os | 10.2.10 | – |
+30 more
Required action (CISA's text)
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.
Description (NVD)
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).
Vendor advisories
- Vulnerabilities in PHP Affecting Cisco Products: October 2026
- PHP2Shell core RCE vulnerability patches (CVE-2026-109618 and CVE-2026-109619)
SOURCES
Other PHP Group flaws
- CVE-2026-109618: PHP Memory Corruption Vulnerability
- CVE-2024-4577: PHP-CGI OS Command Injection Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 5 Nov 2026.