Fix https://github.com/firefly-iii/firefly-iii/issues/11995

app/Http/Controllers/Auth/RegisterController.php

@@ -83,7 +83,7 @@ final class RegisterController extends Controller
             throw new FireflyException('Registration is currently not available :(');
         }
 
-        $this->validator($request->only(['email', 'password']))->validate();
+        $this->validator($request->only(['email', 'password', 'password_confirmation']))->validate();
         $user              = $this->createUser($request->only(['email', 'password']));
         Log::info(sprintf('Registered new user %s', $user->email));
         $owner             = new OwnerNotifiable();

changelog.md

@@ -3,6 +3,14 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+### v6.5.8 - 2026-03-22
+
+<!-- summary: This release fixes a regression bug in user registration. -->
+
+### Fixed
+
+- #11995
+
 ## v6.5.7 - 2026-03-21
 
 <!-- summary: There is a new security policy for AI-generated security advisories and of course, some interesting but annoying bugs fixed. -->