Bump tomcat from 10.1.55 to 10.1.56 to fix CVE-2026-53434 and CVE-2026-55955

pom.xml

@@ -71,6 +71,7 @@
         <spring-boot-test.version>3.5.13</spring-boot-test.version>
         <commons-lang3.version>3.18.0</commons-lang3.version> <!-- to fix CVE-2025-48924. TODO: remove when fixed in spring-boot-dependencies -->
         <netty.version>4.1.136.Final</netty.version> <!-- to fix CVE-2026-44891, CVE-2026-55831, CVE-2026-55833, CVE-2026-55851, CVE-2026-56745, CVE-2026-56817, CVE-2026-56819, CVE-2026-56820, CVE-2026-56821, CVE-2026-56822, CVE-2026-59901, CVE-2026-59920, CVE-2026-73507 (supersedes earlier netty CVE pins; also retains the 4.1.134 MQTT decoder regression fix). TODO: remove when fixed in spring-boot-dependencies -->
+        <tomcat.version>10.1.56</tomcat.version> <!-- to fix CVE-2026-53434 and CVE-2026-55955. Pinned via the tomcat-embed overrides below: spring-boot-dependencies is imported as a BOM, so this property alone would not win. TODO: remove when fixed in spring-boot-dependencies -->
         <javax.xml.bind-api.version>2.4.0-b180830.0359</javax.xml.bind-api.version>
         <jjwt.version>0.12.5</jjwt.version>
         <rat.version>0.10</rat.version> <!-- unused -->
@@ -1015,6 +1016,23 @@
                 <scope>import</scope>
             </dependency>
             <!-- End of netty-bom version override -->
+            <!-- Temporary tomcat-embed version override -->
+            <dependency>
+                <groupId>org.apache.tomcat.embed</groupId>
+                <artifactId>tomcat-embed-core</artifactId>
+                <version>${tomcat.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.tomcat.embed</groupId>
+                <artifactId>tomcat-embed-el</artifactId>
+                <version>${tomcat.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.tomcat.embed</groupId>
+                <artifactId>tomcat-embed-websocket</artifactId>
+                <version>${tomcat.version}</version>
+            </dependency>
+            <!-- End of tomcat-embed version override -->
             <dependency>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-dependencies</artifactId>