CriticalCVE-2026-109619

    RCE via stale global state (CVE-2026-109619)

    Published Last modified Sources: CVE.org, Ubuntu, CERT-EU, Debian, BSI, Fortinet PSIRT

    What is affected, what to do

    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 vulnerability is being actively exploited; treat it as a priority. Update PHP to version 8.2.35, PHP to version 8.3.36, PHP to version 8.4.27.

    Affected
    • PHP lt 8.2.0..8.2.35
    • PHP lt 8.3.0..8.3.36
    • PHP lt 8.4.0..8.4.27
    • PHP lt 8.5.0..8.5.12
    Fixed in
    • PHP 8.2.35
    • PHP 8.3.36
    • PHP 8.4.27
    • PHP 8.5.12

    Not sure whether and how you are affected? Ask a question about this vulnerability

    Metrics

    9.8

    Priority

    XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

    Source: Vendor (CNA), CVSS v3

    9.2

    CVSS v4

    Severity Critical on the scale from 0 to 10.

    Source: CVE.org, Ubuntu, CERT-EU, Debian, BSI, Fortinet PSIRT

    —

    EPSS score

    No value is available for this vulnerability.

    Show all metrics
    Severity
    Critical
    Priority (0–325)

    The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?

    Read in glossary
    76.00 Methodology
    Exploit maturity

    An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.

    Read in glossary
    actively exploitedSource: VulnCheck KEV (opens in a new tab), ANSSI / CERT-FR How we classify
    XIEM Effective CVSS

    XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.

    Read in glossary
    9.8 Methodology
    CVSS v4

    CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.

    Read in glossary
    9.2
    KEV status

    The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.

    Read in glossary
    —
    Published
    CWE

    CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.

    Read in glossary
    CWE-416, CWE-755, CWE-824, CWE-1325, CWE-1419

    Detection rules

    No NEOSEC detection rule is available for this vulnerability yet.

    Classification under NIS2 and CRA

    Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

    NIS2

    NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.

    Read in glossary
    Actively exploited: treat the vulnerability as a priority in vulnerability handling under Art. 21(2)(e) NIS2. If it is exploited in your environment, check the reporting obligation under Art. 23 (early warning within 24 hours).
    CRA

    The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.

    Read in glossary
    Since 11.09.2026, manufacturers of affected products with digital elements must report actively exploited vulnerabilities under Art. 14 CRA, with an early warning within 24 hours via ENISA's single reporting platform.
    ISO/IEC 27001

    ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.

    Read in glossary
    Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

    Description

    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).

    Source: cvelistv5, Ubuntu Security Notices, certeu_advisory, Debian Security Advisories, CVE.org (MITRE), BSI WID Portal, BSI CSAF, fortinet_rss

    Affected products

    The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

    Affected products
    VendorProductAffected versionsFixed in
    PHP GroupPHP
    • 8.2.0 – < 8.2.35
    • 8.5.0 – < 8.5.12
    • 8.4.0 – < 8.4.27
    • 8.3.0 – < 8.3.36
    • 8.2.35
    • 8.5.12
    • 8.4.27
    • 8.3.36

    Affected operating systems

    Affected operating systems
    FamilyVendorProductVersion
    Linuxubuntuphp5trusty
    Linuxubuntuphp7.0xenial
    Linuxubuntuphp7.2bionic
    Linuxubuntuphp7.4focal
    Linuxubuntuphp8.1jammy
    Linuxubuntuphp8.3noble
    Linuxdebianphp8.4trixie
    Linuxubuntuphp8.5resolute
    Linuxubuntuphp8.5stonking

    Weakness classes (CWE)

    • CWE-416Use After Free

      Variant

      The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

      Entry at MITRE CWE-416

    • CWE-755Improper Handling of Exceptional Conditions

      Class

      The product does not handle or incorrectly handles an exceptional condition.

      Entry at MITRE CWE-755

    • CWE-824Access of Uninitialized Pointer

      Base

      The product accesses or uses a pointer that has not been initialized.

      Entry at MITRE CWE-824

    • CWE-1325Improperly Controlled Sequential Memory Allocation

      Base

      The product manages a group of objects or resources and performs a separate memory allocation for each object, but it does not properly limit the total amount of memory that is consumed by all of the combined objects.

      Entry at MITRE CWE-1325

    • CWE-1419Incorrect Initialization of Resource

      Class

      The product attempts to initialize a resource but does not correctly do so, which might leave the resource in an unexpected, incorrect, or insecure state when it is accessed.

      Entry at MITRE CWE-1419

    Public exploit references

    Publicly reported proof-of-concepts, exploit modules and detection templates for this vulnerability. NEOSEC links to the original sources only and does not provide any exploit code.

    Public exploit references
    SourceReferenceMaturityPublished
    ANSSI / CERT-FRLicence Ouverte 2.0, as of CERTFR-2026-ALE-014 – [Màj] Multiples vulnérabilités dans PHP (opens in a new tab)cert.cyber.gouv.fractively exploited

    References & sources

    • github.comphp/php-src/security/advisories/GHSA-6wmf-4rv5-p3rpVendor advisory
    • cert.atCERT.at: Kritische Sicherheitslücken in PHP - Updates verfügbarcert-at
    • cert.cyber.gouv.frANSSI / CERT-FR: CERTFR-2026-ALE-014 – [Màj] Multiples vulnérabilités dans PHPcert-fr
    • wiz.ioblog/php2shell-php-rceThird-party advisory
    • openwall.comlists/oss-security/2026/10/21/7
    • openwall.comlists/oss-security/2026/10/21/16
    • openwall.comlists/oss-security/2026/10/21/17
    • openwall.comlists/oss-security/2026/10/21/23

    Reanalysis & status changes

    Chronological NVD audit events for this CVE — reanalyses, CVSS updates, CPE diffs.

    1. CVE Modifiedaf854a3a-2127-422b-91ae-364da2661108

      • Reference: after http://www.openwall.com/lists/oss-security/2026/10/21/23

    2. CVE Modifiedaf854a3a-2127-422b-91ae-364da2661108

      • Reference: after http://www.openwall.com/lists/oss-security/2026/10/21/16
      • Reference: after http://www.openwall.com/lists/oss-security/2026/10/21/17

    3. CVE Modified134c704f-9b21-4f2e-91b3-4a467353bcc0

      • Reference: after https://www.wiz.io/blog/php2shell-php-rce
      • SSVC: after {"id":"CVE-2026-109619","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technical…

    4. New CVE Receivedsecurity@php.net

      • Description: after 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 V4.0: after AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
      • CWE: after CWE-824
      • CWE: after CWE-416

    Linked advisories

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    Badge preview for CVE-2026-109619
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