CVE-2026-109618

CriticalActively exploited (CISA KEV)

Description

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).

SeverityCritical
CVSS9.2
Exploit probability100. percentile100%
ProductPHP Group PHP
PublishedOct 21, 2026
Added to KEVOct 26, 2026

How to fix

CISA required action

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.

CISA due date: Oct 29, 2026
Update
  • php php8.2.35, 8.3.36, 8.4.27, 8.5.12 or later
  • paloaltonetworks pan-os10.2.7, 11.1.4, 11.2.4, 12.1.4, 12.2.4 or later

Affected products

ProductAffected versionsFixed in
php php7.3.0 ≤ v < 8.2.35, 8.3.0 ≤ v < 8.3.36, 8.4.0 ≤ v < 8.4.27, 8.5.0 ≤ v < 8.5.128.2.35, 8.3.36, 8.4.27, 8.5.12
siemens ruggedcom_ape1808_firmwareNo range specified—
paloaltonetworks pan-os10.2.0 ≤ v < 10.2.7, 10.2.7, 10.2.8, 10.2.9, 10.2.10, 10.2.11, 10.2.12, 10.2.13, 10.2.14, 10.2.15, 10.2.16, 10.2.17, 10.2.18, 11.1.0 ≤ v < 11.1.4, 11.1.4, 11.1.5, 11.1.6, 11.1.7, 11.1.8, 11.1.9, 11.1.10, 11.1.11, 11.1.12, 11.1.13, 11.1.14, 11.1.15, 11.1.16, 11.2.0 ≤ v < 11.2.4, 11.2.4, 11.2.5, 11.2.6, 11.2.7, 11.2.8, 11.2.9, 11.2.10, 11.2.11, 11.2.12, 11.2.13, 11.2.15, 11.2.16, 12.1.0 ≤ v < 12.1.4, 12.1.4, 12.1.5, 12.1.6, 12.1.7, 12.1.8, 12.1.9, 12.1.10, 12.2.0 ≤ v < 12.2.4, 12.2.4, No range specified10.2.7, 11.1.4, 11.2.4, 12.1.4, 12.2.4
paloaltonetworks panorama_virtual_applianceNo range specified—
siemens blueplanet_360_nx3_m6_wm_od_iisx_firmwareNo range specified—
siemens blueplanet_360_nx3_m6_wm_od_iisx-s_firmwareNo range specified—
siemens energy_engage2.0, 3.1—
siemens spectrum_power_4No range specified—
siemens spectrum_power_7No range specified—
siemens spectrum_power_tgNo range specified—
siemens amis_tsNo range specified—

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