Magento APSB26-153 (October 2026 Security Patch): What It Fixes and How to Apply It
APSB26-153 is the October 2026 Magento security patch from Adobe: 11 CVEs, five critical, topped by an unauthenticated CVSS 10.0 template engine flaw. Here is who is affected, what the 2.4.9 CE patch changes, and the exact steps I use to apply 249-2026-10-001-CE.patch on Magento Open Source.