CISA Adds Two PHP Vulnerabilities to Known Exploited Catalog, Issues Urgent Patching Advisory

The Cybersecurity and Infrastructure Security Agency (CISA) has added two new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog and issued a PHP Alert emphasizing immediate patching. The newly added vulnerabilities are CVE-2026-109618, a PHP memory corruption vulnerability, and CVE-2026-109619, a PHP stale internal request-state vulnerability. CISA noted that these types of vulnerabilities are a frequent attack vector for malicious cyber actors and pose significant risks to the federal enterprise.

Binding Operational Directive (BOD) 26-04: Prioritizing Security Updates Based on Risk establishes vulnerability management requirements for Federal Civilian Executive Branch (FCEB) agencies. The directive reinforces the importance of the KEV Catalog and requires federal agencies to prioritize rapid remediation of high-risk vulnerabilities listed in the catalog on publicly exposed assets that grant total control of the asset post-exploitation, while deferring action for lower-risk vulnerabilities. BOD 26-04 also establishes expectations for agencies to check whether threat actors compromised the system before the patch was applied.

While BOD 26-04 applies only to FCEB agencies, CISA encourages all organizations to adopt risk-based vulnerability management and prioritize remediation of KEV Catalog vulnerabilities. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria. Organizations aware of an exploited vulnerability not currently listed in the KEV Catalog are encouraged to submit it for potential addition through CISA’s KEV Nomination Form.

The KEV Catalog additions and PHP Alert are official CISA publications. The specific technical details of the vulnerabilities are as reported. No independent verification of active exploitation beyond CISA's catalog listing was performed.