---
title: "CVE-2026-109619: RCE via stale global state"
url: https://erroneo.us/security/cve/CVE-2026-109619/
description: "CVE-2026-109619 (PHP Group PHP): PHP has various global state that temporarily points into request memory. In some scenarios, global state may not be…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-10-21
date_modified: 2026-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-109619"
kev: false
cvss: 9.2
epss: null
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-109619: RCE via stale global state

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Editorial verdict: Act now. PHP2Shell: Critical Unauthenticated RCE in PHP — If PHP answers HTTP requests anywhere you run it, patch or apply a vendor fix today; this is pre-application, unauthenticated, and attack traffic started before the patch shipped.

## What it is

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).

## Affected products (CVE record)

- PHP Group PHP: 8.2.* < 8.2.35, 8.3.* < 8.3.36, 8.4.* < 8.4.27, 8.5.* < 8.5.12

## Severity

- php CVSS 4.0: 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`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable no , technical impact total .

## Sources

- [github.com](https://github.com/php/php-src/security/advisories/GHSA-6wmf-4rv5-p3rp)
- [CVE.org record CVE-2026-109619](https://www.cve.org/CVERecord?id=CVE-2026-109619)
- [NVD entry CVE-2026-109619](https://nvd.nist.gov/vuln/detail/CVE-2026-109619)
- [wiz.io](https://www.wiz.io/blog/php2shell-php-rce)
- [openwall.com](http://www.openwall.com/lists/oss-security/2026/10/21/7)
- [openwall.com](http://www.openwall.com/lists/oss-security/2026/10/21/16)
- [openwall.com](http://www.openwall.com/lists/oss-security/2026/10/21/17)
- [openwall.com](http://www.openwall.com/lists/oss-security/2026/10/21/23)

---
Source page: https://erroneo.us/security/cve/CVE-2026-109619/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt