CVE-2026-109619
high CISA KEVPHP Stale Internal Request-State Vulnerability
Vendor / product: PHP Group — PHP
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).
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Required action (CISA)
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.
Affected products
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
References
- https://github.com/php/php-src/security/advisories/GHSA-6wmf-4rv5-p3rp security@php.net
- http://www.openwall.com/lists/oss-security/2026/10/21/16 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2026/10/21/17 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2026/10/21/23 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2026/10/21/7 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2026/10/22/14 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2026/10/22/15 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2026/10/22/16 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2026/10/22/19 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2026/10/22/2 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2026/10/22/20 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2026/10/23/4 af854a3a-2127-422b-91ae-364da2661108
- https://arcticwolf.com/resources/blog/php2shell-critical-php-vulnerabilities-enable-unauth... 134c704f-9b21-4f2e-91b3-4a467353bcc0
- https://cert-portal.siemens.com/productcert/html/ssa-566512.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
- https://php2shell.delftintellab.com/ 134c704f-9b21-4f2e-91b3-4a467353bcc0
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-109619 134c704f-9b21-4f2e-91b3-4a467353bcc0
- https://www.wiz.io/blog/php2shell-php-rce 134c704f-9b21-4f2e-91b3-4a467353bcc0