1 files changed, 5 insertions, 0 deletions
diff --git a/src/remote/activitypub/models/person.ts b/src/remote/activitypub/models/person.ts
index 84b2f0c51c..eb8c00a10b 100644
--- a/src/remote/activitypub/models/person.ts
+++ b/src/remote/activitypub/models/person.ts
@@ -29,6 +29,7 @@ import { toArray } from '@/prelude/array';
 import { fetchInstanceMetadata } from '@/services/fetch-instance-metadata';
 import { normalizeForSearch } from '@/misc/normalize-for-search';
 import { truncate } from '@/misc/truncate';
+import { StatusError } from '@/misc/fetch';
 
 const logger = apLogger;
 
@@ -116,6 +117,10 @@ export async function fetchPerson(uri: string, resolver?: Resolver): Promise<Use
 export async function createPerson(uri: string, resolver?: Resolver): Promise<User> {
 	if (typeof uri !== 'string') throw new Error('uri is not string');
 
+	if (uri.startsWith(config.url)) {
+		throw new StatusError('cannot resolve local user', 400, 'cannot resolve local user');
+	}
+
 	if (resolver == null) resolver = new Resolver();
 
 	const object = await resolver.resolve(uri) as any;