CVE-2026-109618

Critical

PHP Memory Corruption Vulnerability

9.8 CVSS v3.1 CVSS v4.0: 9.2

Published: Oct 21, 2026
Updated: Oct 28, 2026
Vendor: Paloaltonetworks, Php, Siemens
Affected versions: See affected products
Weakness: CWE-416, CWE-755, CWE-824, CWE-1325

Summary

PHP uses longjmp() for out-of-memory (OOM) errors to exit the current context and abort handling of the request. Some contexts may not properly account for this scenario and leave request memory in an uninitialized state before performing an allocation. The subsequent request cleanup procedure may read or branch on this memory. Multiple OOM strategies can consistently trigger this condition and lead to remote code execution (RCE).

Severity

Critical (9.8)

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v4.0 (9.2)

CVSS: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

Affected products

Php Php >= 7.3.0, < 8.2.35
Php Php >= 8.3.0, < 8.3.36
Php Php >= 8.4.0, < 8.4.27
Php Php >= 8.5.0, < 8.5.12
Siemens Ruggedcom Ape1808 Firmware
Paloaltonetworks Pan-os >= 10.2.0, < 10.2.7
Paloaltonetworks Pan-os 10.2.7
Paloaltonetworks Pan-os 10.2.8
Paloaltonetworks Pan-os 10.2.9
Paloaltonetworks Pan-os 10.2.10
Paloaltonetworks Pan-os 10.2.11
Paloaltonetworks Pan-os 10.2.12

Show 28 more

Paloaltonetworks Pan-os 10.2.13
Paloaltonetworks Pan-os 10.2.14
Paloaltonetworks Pan-os 10.2.15
Paloaltonetworks Pan-os 10.2.16
Paloaltonetworks Pan-os 10.2.17
Paloaltonetworks Pan-os 10.2.18
Paloaltonetworks Pan-os >= 11.1.0, < 11.1.4
Paloaltonetworks Pan-os 11.1.4
Paloaltonetworks Pan-os 11.1.5
Paloaltonetworks Pan-os 11.1.6
Paloaltonetworks Pan-os 11.1.7
Paloaltonetworks Pan-os 11.1.8
Paloaltonetworks Pan-os 11.1.9
Paloaltonetworks Pan-os 11.1.10
Paloaltonetworks Pan-os 11.1.11
Paloaltonetworks Pan-os 11.1.12
Paloaltonetworks Pan-os 11.1.13
Paloaltonetworks Pan-os 11.1.14
Paloaltonetworks Pan-os 11.1.15
Paloaltonetworks Pan-os 11.1.16
Paloaltonetworks Pan-os >= 11.2.0, < 11.2.4
Paloaltonetworks Pan-os 11.2.4
Paloaltonetworks Pan-os 11.2.5
Paloaltonetworks Pan-os 11.2.6
Paloaltonetworks Pan-os 11.2.7
Paloaltonetworks Pan-os 11.2.8
Paloaltonetworks Pan-os 11.2.9
Paloaltonetworks Pan-os 11.2.10

Exploitation status

Actively exploited

Listed in the CISA Known Exploited Vulnerabilities catalog on Oct 26, 2026. Federal remediation due: Oct 29, 2026.

Technical details

Technical analysis has not been written for this record yet.

Mitigation & remediation

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.