CVE-2026-109618

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).

CVSS 4.0

9.2CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

100% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-25)

CWEs

CWE-416, CWE-755, CWE-824, CWE-1325

Published

2026-10-21

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• paloaltonetworks:pan-os
• paloaltonetworks:panorama_virtual_appliance
• php:php
• siemens:ruggedcom_ape1808_firmware

References

• https://github.com/php/php-src/security/advisories/GHSA-w8hw-w9fx-j79w
• http://www.openwall.com/lists/oss-security/2026/10/21/6
• http://www.openwall.com/lists/oss-security/2026/10/23/5
• https://cert-portal.siemens.com/productcert/html/ssa-566512.html
• https://www.wiz.io/blog/php2shell-php-rce

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