TL;DR SAP Security Patch Day for October 2026 addressed 20 CVEs on October 13. Four of them are critical vulnerabilities, led by a CVSS 10.0 flaw in the SAP Cloud SDK for Python. Two more critical bugs in NetWeaver Visual Composer and S/4HANA score 9.9. Why It Matters SAP systems run finance, supply chain and HR for many of the world's largest firms.