diff --git a/dojo/tools/trivy_operator/checks_handler.py b/dojo/tools/trivy_operator/checks_handler.py
index 506058ef6e..79876bef28 100644
--- a/dojo/tools/trivy_operator/checks_handler.py
+++ b/dojo/tools/trivy_operator/checks_handler.py
@@ -17,7 +17,9 @@ def handle_checks(self, labels, checks, test):
         resource_kind = labels.get("trivy-operator.resource.kind", "")
         resource_name = labels.get("trivy-operator.resource.name", "")
         container_name = labels.get("trivy-operator.container.name", "")
-        service = f"{resource_namespace}/{resource_kind}/{resource_name}"
+        # resource_name changes every deploy (ReplicaSet-generated) — excluded so
+        # service stays stable and close_old_findings matches across redeploys.
+        service = f"{resource_namespace}/{resource_kind}"
         if container_name:
             service = f"{service}/{container_name}"
         for check in checks:
diff --git a/dojo/tools/trivy_operator/secrets_handler.py b/dojo/tools/trivy_operator/secrets_handler.py
index 1bead526d7..150c2c04dd 100644
--- a/dojo/tools/trivy_operator/secrets_handler.py
+++ b/dojo/tools/trivy_operator/secrets_handler.py
@@ -24,7 +24,9 @@ def handle_secrets(self, labels, secrets, test, image=None):
         resource_kind = labels.get("trivy-operator.resource.kind", "")
         resource_name = labels.get("trivy-operator.resource.name", "")
         container_name = labels.get("trivy-operator.container.name", "")
-        service = f"{resource_namespace}/{resource_kind}/{resource_name}"
+        # resource_name changes every deploy (ReplicaSet-generated) — excluded so
+        # service stays stable and close_old_findings matches across redeploys.
+        service = f"{resource_namespace}/{resource_kind}"
         if container_name:
             service = f"{service}/{container_name}"
         for secret in secrets:
diff --git a/dojo/tools/trivy_operator/vulnerability_handler.py b/dojo/tools/trivy_operator/vulnerability_handler.py
index 64826292b6..7aac4d4856 100644
--- a/dojo/tools/trivy_operator/vulnerability_handler.py
+++ b/dojo/tools/trivy_operator/vulnerability_handler.py
@@ -24,7 +24,9 @@ def handle_vulns(self, labels, vulnerabilities, test, image=None):
         resource_kind = labels.get("trivy-operator.resource.kind", "")
         resource_name = labels.get("trivy-operator.resource.name", "")
         container_name = labels.get("trivy-operator.container.name", "")
-        service = f"{resource_namespace}/{resource_kind}/{resource_name}"
+        # resource_name changes every deploy (ReplicaSet-generated) — excluded so
+        # service stays stable and close_old_findings matches across redeploys.
+        service = f"{resource_namespace}/{resource_kind}"
         if container_name:
             service = f"{service}/{container_name}"
         for vulnerability in vulnerabilities:
diff --git a/unittests/tools/test_trivy_operator_parser.py b/unittests/tools/test_trivy_operator_parser.py
index f9ccaf16c4..f88795ce4c 100644
--- a/unittests/tools/test_trivy_operator_parser.py
+++ b/unittests/tools/test_trivy_operator_parser.py
@@ -64,6 +64,19 @@ def test_vulnerabilityreport_single_vulns(self):
             self.assertEqual(4.2, finding.cvssv3_score)
             self.assertEqual(True, finding.fix_available)
 
+    def test_vulnerabilityreport_service_excludes_volatile_replicaset_name(self):
+        # regression test: `service` must stay stable across redeploys, otherwise
+        # DefectDojo's close_old_findings can never match findings from a previous
+        # deploy generation and old findings are never closed (see issue #16026).
+        # The fixture's `trivy-operator.resource.name` label is a ReplicaSet-generated
+        # name ("nginx-deployment-965685897") and must NOT end up in `service`.
+        with sample_path("vulnerabilityreport_single_vuln.json").open(encoding="utf-8") as test_file:
+            parser = TrivyOperatorParser()
+            findings = parser.get_findings(test_file, Test())
+            finding = findings[0]
+            self.assertEqual("default/ReplicaSet/nginx", finding.service)
+            self.assertNotIn("nginx-deployment-965685897", finding.service)
+
     def test_vulnerabilityreport_many(self):
         with sample_path("vulnerabilityreport_many.json").open(encoding="utf-8") as test_file:
             parser = TrivyOperatorParser()