Elastic Stack 8.1.3, released on April 20, 2022, includes critical updates and fixes, addressing a potential security vulnerability and resolving several notable issues in Observability and Security solutions. The patch release rectifies a memory overflow bug in the APM Server when overloaded by requests, urging users running versions 8.0.0 to 8.1.2 to upgrade. It also resolves multiple UI performance issues in high-field mapping environments and fixes a bug related to binary verification failures during Elastic Agent upgrades in versions 8.1.1 and 8.1.2. The release includes additional minor enhancements and fixes across the stack, with detailed information available in the release notes.