1 files changed, 12 insertions, 1 deletions
diff --git a/app/lib/activitypub/activity/announce.rb b/app/lib/activitypub/activity/announce.rb
index 04afeea20..9f8ffd9fb 100644
--- a/app/lib/activitypub/activity/announce.rb
+++ b/app/lib/activitypub/activity/announce.rb
@@ -2,8 +2,11 @@
 
 class ActivityPub::Activity::Announce < ActivityPub::Activity
   def perform
+    return reject_payload! if delete_arrived_first?(@json['id']) || !related_to_local_activity?
+
     original_status = status_from_object
-    return if original_status.nil? || delete_arrived_first?(@json['id']) || !announceable?(original_status)
+
+    return reject_payload! if original_status.nil? || !announceable?(original_status)
 
     status = Status.find_by(account: @account, reblog: original_status)
 
@@ -39,4 +42,12 @@ class ActivityPub::Activity::Announce < ActivityPub::Activity
   def announceable?(status)
     status.account_id == @account.id || status.public_visibility? || status.unlisted_visibility?
   end
+
+  def related_to_local_activity?
+    followed_by_local_accounts? || requested_through_relay? || reblog_of_local_status?
+  end
+
+  def reblog_of_local_status?
+    status_from_uri(object_uri)&.account&.local?
+  end
 end