diff --git a/x-pack/legacy/plugins/siem/server/lib/detection_engine/index/create_bootstrap_index.ts b/x-pack/legacy/plugins/siem/server/lib/detection_engine/index/create_bootstrap_index.ts
index d7cb922b5b6c..dff6e7136bff 100644
--- a/x-pack/legacy/plugins/siem/server/lib/detection_engine/index/create_bootstrap_index.ts
+++ b/x-pack/legacy/plugins/siem/server/lib/detection_engine/index/create_bootstrap_index.ts
@@ -19,7 +19,7 @@ export const createBootstrapIndex = async (
   index: string
 ): Promise<unknown> => {
   return callWithRequest('transport.request', {
-    path: `${index}-000001`,
+    path: `/${index}-000001`,
     method: 'PUT',
     body: {
       aliases: {
diff --git a/x-pack/legacy/plugins/siem/server/lib/detection_engine/index/delete_policy.ts b/x-pack/legacy/plugins/siem/server/lib/detection_engine/index/delete_policy.ts
index 92003f165d99..aa31c427ec84 100644
--- a/x-pack/legacy/plugins/siem/server/lib/detection_engine/index/delete_policy.ts
+++ b/x-pack/legacy/plugins/siem/server/lib/detection_engine/index/delete_policy.ts
@@ -11,7 +11,7 @@ export const deletePolicy = async (
   policy: string
 ): Promise<unknown> => {
   return callWithRequest('transport.request', {
-    path: `_ilm/policy/${policy}`,
+    path: `/_ilm/policy/${policy}`,
     method: 'DELETE',
   });
 };
diff --git a/x-pack/legacy/plugins/siem/server/lib/detection_engine/index/get_policy_exists.ts b/x-pack/legacy/plugins/siem/server/lib/detection_engine/index/get_policy_exists.ts
index 7541c4217b38..d5ab1a10180c 100644
--- a/x-pack/legacy/plugins/siem/server/lib/detection_engine/index/get_policy_exists.ts
+++ b/x-pack/legacy/plugins/siem/server/lib/detection_engine/index/get_policy_exists.ts
@@ -12,7 +12,7 @@ export const getPolicyExists = async (
 ): Promise<boolean> => {
   try {
     await callWithRequest('transport.request', {
-      path: `_ilm/policy/${policy}`,
+      path: `/_ilm/policy/${policy}`,
       method: 'GET',
     });
     // Return true that there exists a policy which is not 404 or some error
diff --git a/x-pack/legacy/plugins/siem/server/lib/detection_engine/index/set_policy.ts b/x-pack/legacy/plugins/siem/server/lib/detection_engine/index/set_policy.ts
index 115f0af75898..fae28bab749c 100644
--- a/x-pack/legacy/plugins/siem/server/lib/detection_engine/index/set_policy.ts
+++ b/x-pack/legacy/plugins/siem/server/lib/detection_engine/index/set_policy.ts
@@ -12,7 +12,7 @@ export const setPolicy = async (
   body: unknown
 ): Promise<unknown> => {
   return callWithRequest('transport.request', {
-    path: `_ilm/policy/${policy}`,
+    path: `/_ilm/policy/${policy}`,
     method: 'PUT',
     body,
   });
diff --git a/x-pack/legacy/plugins/siem/server/lib/detection_engine/privileges/read_privileges.ts b/x-pack/legacy/plugins/siem/server/lib/detection_engine/privileges/read_privileges.ts
index 3b84075b9e43..a93be40738e5 100644
--- a/x-pack/legacy/plugins/siem/server/lib/detection_engine/privileges/read_privileges.ts
+++ b/x-pack/legacy/plugins/siem/server/lib/detection_engine/privileges/read_privileges.ts
@@ -11,7 +11,7 @@ export const readPrivileges = async (
   index: string
 ): Promise<unknown> => {
   return callWithRequest('transport.request', {
-    path: `_security/user/_has_privileges`,
+    path: '/_security/user/_has_privileges',
     method: 'POST',
     body: {
       cluster: [