diff --git a/charts/apl-network-policies/templates/networkpolicies/harbor-db.yaml b/charts/apl-network-policies/templates/networkpolicies/harbor-db.yaml
new file mode 100644
index 0000000000..7a02e43b9a
--- /dev/null
+++ b/charts/apl-network-policies/templates/networkpolicies/harbor-db.yaml
@@ -0,0 +1,47 @@
+{{- if .Values.netpols.harborDb }}
+---
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: harbor-db-platform-policy
+  namespace: harbor
+  labels:
+    {{- include "apl-network-policies.labels" . | nindent 4 }}
+    app: harbor
+spec:
+  # Scoped to the Harbor CloudNativePG instances rather than the whole harbor namespace: Harbor has
+  # a wide component surface (core, jobservice, registry, trivy, exporter, redis) and a
+  # namespace-wide Ingress policy would have to enumerate all of it correctly or take the registry
+  # down. The database is where the documented default-deny gap actually is.
+  podSelector:
+    matchLabels:
+      cnpg.io/cluster: harbor-otomi-db
+  policyTypes:
+    - Ingress
+  ingress:
+    # Allow the CloudNativePG operator to poll instance status (8000) and metrics (9187).
+    # Without this the operator cannot read instance status, the Harbor Postgres replica never
+    # starts, and the stack stalls on Instance Status Extraction Error → ClusterIsNotReady →
+    # Degraded — with nothing in the symptom pointing at a NetworkPolicy.
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              name: cnpg-system
+    # Allow the Harbor components (core, jobservice, registry, exporter, trivy) to reach Postgres,
+    # and the instances to reach each other for replication.
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              name: harbor
+    # Allow monitoring access
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              name: monitoring
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/instance: po-prometheus
+      ports:
+        - protocol: TCP
+          port: 9187
+{{- end }}
diff --git a/charts/apl-network-policies/values.yaml b/charts/apl-network-policies/values.yaml
index 7c0f0a7adb..d12df3a02e 100644
--- a/charts/apl-network-policies/values.yaml
+++ b/charts/apl-network-policies/values.yaml
@@ -32,5 +32,14 @@
 #   * Monitoring namespace (for metrics scraping)
 #   * Internal otomi namespace communication
 #
+# For harbor (netpols.harborDb: true):
+# - Creates a NetworkPolicy in the harbor namespace, scoped to the CloudNativePG instances of
+#   harbor-otomi-db (not the whole namespace — Harbor's component surface is wide)
+# - Allows ingress from:
+#   * cnpg-system (operator polling instance status on 8000 and metrics on 9187)
+#   * the harbor namespace (components reaching Postgres; instances replicating to each other)
+#   * Monitoring namespace on 9187 (for metrics scraping)
+# - Only rendered when harbor is enabled
+#
 # The complex network policy rules are baked into the chart templates,
 # so users only need to toggle network policies on/off per application.
diff --git a/helmfile.d/snippets/defaults.yaml b/helmfile.d/snippets/defaults.yaml
index 7d9d569960..b8f3683fc0 100644
--- a/helmfile.d/snippets/defaults.yaml
+++ b/helmfile.d/snippets/defaults.yaml
@@ -199,6 +199,8 @@ environments:
             _rawValues: {}
           harbor:
             enabled: false
+            networkPolicies:
+              enabled: false
             oidcAutoOnboard: true
             oidcUserClaim: email
             registry:
diff --git a/values-schema.yaml b/values-schema.yaml
index 9502538c98..c939df5a3f 100644
--- a/values-schema.yaml
+++ b/values-schema.yaml
@@ -1690,6 +1690,8 @@ properties:
         properties:
           _rawValues:
             $ref: '#/definitions/rawValues'
+          networkPolicies:
+            $ref: '#/definitions/appNetworkPolicyConfig'
           enabled:
             type: boolean
             default: true
diff --git a/values/apl-network-policies/apl-network-policies.gotmpl b/values/apl-network-policies/apl-network-policies.gotmpl
index cb3798134e..d5a54f043e 100644
--- a/values/apl-network-policies/apl-network-policies.gotmpl
+++ b/values/apl-network-policies/apl-network-policies.gotmpl
@@ -1,12 +1,14 @@
 {{- $v := .Values }}
 {{- $a := $v.apps }}
 {{- $oa := $v.apps | get "otomi-api" }}
+{{- $h := $v.apps | get "harbor" }}
 
 # Simple per-app network policy configuration
 netpols:
   gitServer: {{ not ($a | get "git-server.enabled") }}
   gitea: {{ $a.gitea.networkPolicies.enabled}}
   otomiApi: {{ $oa.networkPolicies.enabled}}
+  harborDb: {{ and ($h.networkPolicies.enabled) ($h.enabled) }}
 
 ingressGatewaySelectors:
   - namespaceSelector: