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Known exploited vulnerability

CVE-2026-109619

criticalCVSS 4.0 9.2In CISA KEVEPSS 100%Published · PHP Group

The short answer

CVE-2026-109619 affects PHP Group PHP and is rated critical (CVSS 9.2). CISA added it to the Known Exploited Vulnerabilities catalog on 2026-10-26: attackers are using it, so patch it first.

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).

Weakness: CWE-416, CWE-755, CWE-824, CWE-1325.

Severity

9.2 critical

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/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

Exploited (CISA KEV)

Yes, since Oct 26, 2026

Federal due date Oct 29, 2026

EPSS, next 30 days

100%

Higher than 100% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
High
Attack requirements
Present
Privileges required
None
User interaction
None
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

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…

Affected products

PHP, AMIS TS, AX4, blueplanet 360 NX3 M6 WM OD IISX, blueplanet 360 NX3 M6 WM OD IISX - S, Building X, CADRA, Call stations, Capital, Chargesight, Climatix Cloud IC, Climatix Devices. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2026-109619 being exploited?

Yes. CISA added CVE-2026-109619 to its Known Exploited Vulnerabilities catalog on 2026-10-26, with a federal remediation due date of 2026-10-29.

How do I fix CVE-2026-109619?

CISA's 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…

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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