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CVE-2026-109619RCE via stale global state

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).

9.2 CRITICALEPSS 99.99%⚡ Known Exploited (CISA KEV)NVD: Analyzed

OverviewAffected ProductsReferences
NVD CVE.org

Overview

Severity

ScoreSeverityVersionVector String
9.2CRITICAL4.0php (CNA)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
8.1HIGH3.1NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA required action

⚡ Known exploited · remediation due Oct 29, 2026

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.

Details

CVE ID
CVE-2026-109619
Status
Analyzed
Assigner (CNA)
php
Published
Oct 21, 2026
Last modified
2026-11-05 19:17 UTC
Weaknesses
  • CWE-416 · Use after free
  • CWE-755 · Improper Handling of Exceptional Conditions
  • CWE-824 · Access of uninitialized pointer
  • CWE-1325 · Improperly controlled sequential memory allocation
  • CWE-1419 · Incorrect Initialization of Resource

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 04:08 UTC.