Create ReleaseNote-2.39.4.1.md

releases/2.39/ReleaseNote-2.39.4.1.md

@@ -0,0 +1,13 @@
+# Patch 39.4.1 Release Note
+
+This is a HOTFIX patch release to address the following performance and security issues:
+
+- **[DHIS2-16398](https://dhis2.atlassian.net/browse/DHIS2-16398): Reduce runtime for expensive subquery in /api/events endpoint**  
+  Components: _[App] Tracker_
+
+- **[DHIS2-16402](https://dhis2.atlassian.net/browse/DHIS2-16402): Initiating transaction for cache hits for system settings leads to performance degradation**  
+  Components: _[API] Other_
+
+- It also updates the Struts library to address the recently announced security vulnerability **CVE-2023-50164**.
+
+See [Patch 39.4.0](ReleaseNote-2.39.4.md) for the full list of fixes included in the parent patch release.