diff --git a/charts/library/common-test/Chart.yaml b/charts/library/common-test/Chart.yaml
index 181e6bb405f..a01d9f9715f 100644
--- a/charts/library/common-test/Chart.yaml
+++ b/charts/library/common-test/Chart.yaml
@@ -7,7 +7,7 @@ apiVersion: v2
 appVersion: unknown
 dependencies:
   - name: common
-    version: ~26.3.0
+    version: ~26.4.0
     repository: file://../common/
     condition: ""
     alias: ""
diff --git a/charts/library/common-test/tests/pod/topologySpreadConstraints.yaml b/charts/library/common-test/tests/pod/topologySpreadConstraints.yaml
index ecee7a5815c..3b5f930fe72 100644
--- a/charts/library/common-test/tests/pod/topologySpreadConstraints.yaml
+++ b/charts/library/common-test/tests/pod/topologySpreadConstraints.yaml
@@ -120,6 +120,40 @@ tests:
               topologyKey: truecharts.org/test
               whenUnsatisfiable: ScheduleAnyway
 
+  - it: should pass with topologyKey from "global"
+    set:
+      global:
+        fallbackDefaults:
+          topologyKey: "truecharts.org/test"
+      workload:
+        workload-name1:
+          enabled: true
+          primary: true
+          type: Deployment
+          podSpec: {}
+    asserts:
+      - documentIndex: *deploymentDoc
+        equal:
+          path: spec.selector.matchLabels
+          value:
+            app.kubernetes.io/instance: test-release-name
+            app.kubernetes.io/name: common-test
+            pod.name: workload-name1
+      - documentIndex: *deploymentDoc
+        equal:
+          path: spec.template.spec.topologySpreadConstraints
+          value:
+            - labelSelector:
+                matchLabels:
+                  app.kubernetes.io/instance: test-release-name
+                  app.kubernetes.io/name: common-test
+                  pod.name: workload-name1
+              maxSkew: 1
+              nodeAffinityPolicy: Honor
+              nodeTaintsPolicy: Honor
+              topologyKey: truecharts.org/test
+              whenUnsatisfiable: ScheduleAnyway
+
   - it: should pass with multiple topologySpreadConstraints from "pod"
     set:
       podOptions:
diff --git a/charts/library/common/Chart.yaml b/charts/library/common/Chart.yaml
index 3e0457d2f52..e00cfe954f7 100644
--- a/charts/library/common/Chart.yaml
+++ b/charts/library/common/Chart.yaml
@@ -48,4 +48,4 @@ sources:
   - https://hub.docker.com/_/
   - https://hub.docker.com/r/mikefarah/yq
 type: library
-version: 26.3.0
+version: 26.4.0
diff --git a/charts/library/common/templates/lib/pod/_topologySpreadConstraints .tpl b/charts/library/common/templates/lib/pod/_topologySpreadConstraints .tpl
index 59ddf988420..66c018fa12e 100644
--- a/charts/library/common/templates/lib/pod/_topologySpreadConstraints .tpl	
+++ b/charts/library/common/templates/lib/pod/_topologySpreadConstraints .tpl	
@@ -24,7 +24,7 @@ objectData: The object data to be used to render the Pod.
   {{- if and (mustHas $objectData.type $validTypes) $rootCtx.Values.podOptions.defaultSpread }}
 - maxSkew: 1
   whenUnsatisfiable: ScheduleAnyway
-  topologyKey: "kubernetes.io/hostname"
+  topologyKey: {{ default "kubernetes.io/hostname" $rootCtx.Values.global.fallbackDefaults.topologyKey }}
   labelSelector:
     matchLabels:
       {{- include "tc.v1.common.lib.metadata.selectorLabels" (dict "rootCtx" $rootCtx "objectType" "pod" "objectName" $objectData.shortName) | indent 6 }}
diff --git a/charts/library/common/values.yaml b/charts/library/common/values.yaml
index a2b3af98b93..4630135b524 100644
--- a/charts/library/common/values.yaml
+++ b/charts/library/common/values.yaml
@@ -57,6 +57,9 @@ global:
     # will be used for all CNPG objects
     # Can be overruled per CNPG objects
     pgVersion: 16
+    # -- Define a topologyKey for default topologySpreadConstraints
+    # Will be used when defaultSpread: true
+    topologyKey: kubernetes.io/hostname
   metallb:
     # -- Adds metalLB annotations to services
     addServiceAnnotations: true
diff --git a/website/src/content/docs/common/fallbackDefaults.md b/website/src/content/docs/common/fallbackDefaults.md
index 236a89815ca..923d52e50f5 100644
--- a/website/src/content/docs/common/fallbackDefaults.md
+++ b/website/src/content/docs/common/fallbackDefaults.md
@@ -48,6 +48,7 @@ fallbackDefaults:
       timeoutSeconds: 2
       failureThreshold: 60
       successThreshold: 1
+  topologyKey: kubernetes.io/hostname
 ```
 
 ## `probeType`
@@ -779,6 +780,22 @@ fallbackDefaults:
       successThreshold: 1
 ```
 
+---
+
+## `topologyKey`
+
+Define default topologyKey for topologySpreadConstraints in podOptions
+
+
+|            |                                |
+| ---------- | ------------------------------ |
+| Key        | `fallbackDefaults.topologyKey` |
+| Type       | `string`                          |
+| Required   | ❌                             |
+| Helm `tpl` | ❌                             |
+| Default    | `kubernetes.io/hostname`                            |
+
+
 ---
 
 ## Full Examples
@@ -808,4 +825,5 @@ fallbackDefaults:
       timeoutSeconds: 2
       failureThreshold: 60
       successThreshold: 1
+  topologyKey: truecharts.org/example
 ```