fix(audit): keep personal data and credentials out of audit events

Anonymize the audit events of a deleted user, store only the ID and
name of other users, and drop the metadata copy of actor_email.
Store URLs without query strings, registries without user info, and
the exception class instead of raw SSH errors.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/Actions/IntegrationToken/UpdateIntegrationToken.php

@@ -110,8 +110,8 @@ class UpdateIntegrationToken
                 'integration_token_uuid' => $integrationToken->uuid,
                 'integration_token_name' => $integrationToken->name,
                 'provider' => $provider,
-                'previous_base_url' => $this->baseUrlForAudit(data_get($storedMetadata, 'base_url')),
-                'base_url' => $this->baseUrlForAudit(data_get($metadata, 'base_url')),
+                'previous_base_url' => auditUrl(data_get($storedMetadata, 'base_url')),
+                'base_url' => auditUrl(data_get($metadata, 'base_url')),
             ], 'warning');
         }
 
@@ -146,25 +146,6 @@ class UpdateIntegrationToken
         ));
     }
 
-    /**
-     * Base URL without user info, query, or fragment, which can carry credentials.
-     */
-    private function baseUrlForAudit(mixed $url): ?string
-    {
-        if (! is_string($url) || $url === '') {
-            return null;
-        }
-
-        $parts = parse_url($url);
-        if (! is_array($parts) || ! isset($parts['scheme'], $parts['host'])) {
-            return '[invalid-url]';
-        }
-
-        return $parts['scheme'].'://'.$parts['host']
-            .(isset($parts['port']) ? ':'.$parts['port'] : '')
-            .($parts['path'] ?? '');
-    }
-
     private function reenterSecretMessage(string $provider): string
     {
         return match ($provider) {

app/Http/Controllers/Api/ServerTransferController.php

@@ -112,7 +112,7 @@ class ServerTransferController extends Controller
         auditLog('api.server.migrate', [
             'team_id' => $teamId,
             'server_uuid' => $server->uuid,
-            'target_url' => data_get($server->server_metadata, 'migration.target_url'),
+            'target_url' => auditUrl(data_get($server->server_metadata, 'migration.target_url')),
         ]);
 
         return response()->json([

app/Http/Controllers/Controller.php

@@ -279,7 +279,6 @@ class Controller extends BaseController
             'already_member' => $alreadyMember,
             'member_id' => $user->id,
             'member_name' => $user->name,
-            'member_email' => $user->email,
             'actor_id' => $user->id,
             'actor_name' => $user->name,
             'actor_email' => $user->email,

app/Livewire/Admin/Index.php

@@ -75,7 +75,6 @@ class Index extends Component
             'resource' => 'user',
             'user_name' => $user->name,
             'target_user_id' => $user->id,
-            'target_user_email' => $user->email,
             'target_team_id' => $team_to_switch_to?->id,
         ]);
         Auth::login($user);

app/Livewire/Server/Security/Patches.php

@@ -125,7 +125,7 @@ class Patches extends Component
             try {
                 RebootServer::run($this->server);
             } catch (\Throwable $e) {
-                $this->auditPatchAction('reboot_requested', ['result' => 'failed', 'error' => $e->getMessage()], 'error');
+                $this->auditPatchAction('reboot_requested', ['result' => 'failed', 'error' => class_basename($e)], 'error');
 
                 throw $e;
             }
@@ -212,7 +212,7 @@ class Patches extends Component
         try {
             ConfigureAutomaticSecurityUpdates::run($this->server, $packageManager, $enabled, $time);
         } catch (\Throwable $e) {
-            $this->auditPatchAction('auto_security_updates_updated', [...$auditContext, 'result' => 'failed', 'error' => $e->getMessage()], 'error');
+            $this->auditPatchAction('auto_security_updates_updated', [...$auditContext, 'result' => 'failed', 'error' => class_basename($e)], 'error');
 
             throw $e;
         }

app/Livewire/Server/Transfer.php

@@ -116,7 +116,7 @@ class Transfer extends Component
             auditLog('ui.server.migrate', [
                 'team_id' => $this->server->team_id,
                 'server_uuid' => $this->server->uuid,
-                'target_url' => $this->targetUrl,
+                'target_url' => auditUrl($this->targetUrl),
             ]);
 
             $this->server->refresh();
@@ -141,7 +141,7 @@ class Transfer extends Component
             auditLog('ui.server.transfer_back', [
                 'team_id' => $this->server->team_id,
                 'server_uuid' => $this->server->uuid,
-                'from' => $this->managerUrl,
+                'from' => auditUrl($this->managerUrl),
             ]);
 
             $this->server->refresh();

app/Livewire/Team/AdminView.php

@@ -89,9 +89,7 @@ class AdminView extends Component
             auditLog('ui.user.deleted', [
                 'team_id' => currentTeam()?->id,
                 'resource' => 'user',
-                'user_name' => $user->name,
                 'deleted_user_id' => $user->id,
-                'deleted_user_email' => $user->email,
             ]);
             $this->resetPage();
 

app/Livewire/Team/Member.php

@@ -83,7 +83,6 @@ class Member extends Component
                 'team_id' => $teamId,
                 'member_id' => $this->member->id,
                 'member_name' => $this->member->name,
-                'member_email' => $this->member->email,
             ]);
             // Clear cache for the removed user - both old and new key formats
             Cache::forget("team:{$this->member->id}");
@@ -117,7 +116,6 @@ class Member extends Component
             'team_id' => $teamId,
             'member_id' => $this->member->id,
             'member_name' => $this->member->name,
-            'member_email' => $this->member->email,
             'role' => $role->value,
         ]);
     }

app/Livewire/Team/Member/Access.php

@@ -122,7 +122,6 @@ class Access extends Component
             'team_id' => $this->teamId,
             'member_id' => $member->id,
             'member_name' => $member->name,
-            'member_email' => $member->email,
             'access' => Grant::listToArray($grants),
         ]);
 

app/Models/AuditEvent.php

@@ -203,7 +203,7 @@ class AuditEvent extends Model
             'resource_name' => $resourceName,
             'description' => data_get($context, 'audit_description')
                 ?? trim(($resourceName ?? Str::headline((string) $resourceType)).' '.Str::headline($action)),
-            'metadata' => self::redact(Arr::except($context, ['audit_changes'])),
+            'metadata' => self::redact(Arr::except($context, ['audit_changes', 'actor_email'])),
             'changes' => $changes,
             'ip_address' => app()->bound('request') ? (client_ip(request()) ?: null) : null,
             'user_agent' => app()->bound('request') ? Str::limit((string) request()->userAgent(), 200, '') : null,
@@ -235,6 +235,53 @@ class AuditEvent extends Model
             ->first()?->team()?->id;
     }
 
+    /**
+     * Removes the personal data of a deleted user: from the events that the user did,
+     * and from the events about the user (team member, impersonation, deletion).
+     */
+    public static function anonymizeUser(User $user): void
+    {
+        $replacement = '[deleted user]';
+        $personalValues = array_filter([Str::lower((string) $user->email), Str::lower((string) $user->name)]);
+
+        self::query()
+            ->where(fn (Builder $query) => $query
+                ->where(fn (Builder $query) => $query->where('actor_type', 'user')->where('actor_id', $user->id))
+                ->orWhereJsonContains('metadata->member_id', $user->id)
+                ->orWhereJsonContains('metadata->target_user_id', $user->id)
+                ->orWhereJsonContains('metadata->deleted_user_id', $user->id))
+            ->chunkById(self::PRUNE_BATCH_SIZE, function ($events) use ($personalValues, $replacement, $user): void {
+                foreach ($events as $event) {
+                    if ($event->actor_type === 'user' && (int) $event->actor_id === (int) $user->id) {
+                        $event->actor_name = $replacement;
+                        $event->actor_email = null;
+                        $event->ip_address = null;
+                        $event->user_agent = null;
+                    }
+
+                    if ($event->resource_name !== null && in_array(Str::lower($event->resource_name), $personalValues, true)) {
+                        $event->description = $replacement.substr($event->description, strlen($event->resource_name));
+                        $event->resource_name = $replacement;
+                    }
+
+                    $event->metadata = self::replacePersonalValues($event->metadata, $personalValues, $replacement);
+                    $event->save();
+                }
+            });
+    }
+
+    /**
+     * @param  array<int, string>  $personalValues
+     */
+    private static function replacePersonalValues(mixed $value, array $personalValues, string $replacement): mixed
+    {
+        if (is_array($value)) {
+            return array_map(fn (mixed $item): mixed => self::replacePersonalValues($item, $personalValues, $replacement), $value);
+        }
+
+        return is_string($value) && in_array(Str::lower($value), $personalValues, true) ? $replacement : $value;
+    }
+
     /**
      * Deletes in batches, so a large table is not locked by one long DELETE.
      */

app/Models/User.php

@@ -186,6 +186,8 @@ class User extends Authenticatable implements PasskeyUser, SendsEmail
                 }
             });
         });
+
+        static::deleted(fn (User $user) => AuditEvent::anonymizeUser($user));
     }
 
     /**

app/Services/DockerRegistryLogins.php

@@ -255,7 +255,7 @@ class DockerRegistryLogins
             'server_uuid' => $server->uuid,
             'server_name' => $server->name,
             'team_id' => $server->team_id,
-            'registry' => $registry,
+            'registry' => preg_replace('#^[^/]*@#', '', $registry),
             'outcome' => $succeeded ? 'success' : 'failed',
         ], $succeeded ? 'info' : 'warning');
     }

bootstrap/helpers/audit.php

@@ -53,6 +53,27 @@ if (! function_exists('auditLog')) {
     }
 }
 
+if (! function_exists('auditUrl')) {
+    /**
+     * Scheme, host, port and path of a URL, without user info, query string or fragment.
+     */
+    function auditUrl(mixed $url): ?string
+    {
+        if (! is_string($url) || $url === '') {
+            return null;
+        }
+
+        $parts = parse_url($url);
+        if (! is_array($parts) || ! isset($parts['scheme'], $parts['host'])) {
+            return '[invalid-url]';
+        }
+
+        return $parts['scheme'].'://'.$parts['host']
+            .(isset($parts['port']) ? ':'.$parts['port'] : '')
+            .($parts['path'] ?? '');
+    }
+}
+
 if (! function_exists('auditChangedFields')) {
     /**
      * Names of the attributes that the next save() will really change, without timestamps.

tests/Feature/AccountAuditTest.php

@@ -140,7 +140,8 @@ test('records an accepted team invitation', function () {
         ->and($event->actor_id)->toBe($this->user->id)
         ->and($event->resource_uuid)->toBe('account-audit-invitation')
         ->and(data_get($event->metadata, 'role'))->toBe('admin')
-        ->and(data_get($event->metadata, 'member_email'))->toBe($this->user->email)
+        ->and(data_get($event->metadata, 'member_id'))->toBe($this->user->id)
+        ->and($event->metadata)->not->toHaveKeys(['member_email', 'actor_email'])
         ->and(data_get($event->metadata, 'already_member'))->toBeFalse();
 });
 
@@ -195,7 +196,53 @@ test('records a user deleted by an instance admin', function () {
         ->and($event->team_id)->toBe($this->team->id)
         ->and($event->actor_id)->toBe($this->user->id)
         ->and(data_get($event->metadata, 'deleted_user_id'))->toBe($deletedUser->id)
-        ->and(data_get($event->metadata, 'deleted_user_email'))->toBe('deleted-user@example.com');
+        ->and(accountAuditSerialized($event))->not->toContain('deleted-user@example.com');
+});
+
+test('deleting a user removes their personal data from earlier audit events', function () {
+    $rootTeam = Team::factory()->create(['id' => 0]);
+    $rootTeam->members()->attach($this->user->id, ['role' => 'admin']);
+    $deletedUser = User::factory()->create(['name' => 'Jane Doe', 'email' => 'jane@example.com']);
+    $ownEvent = AuditEvent::factory()->create([
+        'event' => 'auth.user.login',
+        'actor_type' => 'user',
+        'actor_id' => $deletedUser->id,
+        'actor_name' => 'Jane Doe',
+        'actor_email' => 'jane@example.com',
+        'resource_type' => 'user',
+        'resource_name' => 'Jane Doe',
+        'description' => 'Jane Doe Login',
+        'metadata' => ['user_name' => 'Jane Doe'],
+        'ip_address' => '203.0.113.7',
+        'user_agent' => 'Jane Browser',
+    ]);
+    $aboutEvent = AuditEvent::factory()->create([
+        'event' => 'ui.team_member.removed',
+        'actor_type' => 'user',
+        'actor_id' => $this->user->id,
+        'actor_email' => $this->user->email,
+        'metadata' => ['member_id' => $deletedUser->id, 'member_name' => 'Jane Doe', 'member_email' => 'JANE@example.com'],
+    ]);
+    $unrelatedEvent = AuditEvent::factory()->create([
+        'event' => 'ui.team_member.removed',
+        'metadata' => ['member_id' => $deletedUser->id + 1000, 'member_name' => 'Jane Doe'],
+    ]);
+
+    Livewire::test(AdminView::class)
+        ->call('delete', $deletedUser->id, 'password')
+        ->assertReturned(true);
+
+    $ownEvent->refresh();
+    $aboutEvent->refresh();
+
+    expect(accountAuditSerialized($ownEvent))->not->toContain('Jane Doe')
+        ->not->toContain('jane@example.com')
+        ->not->toContain('203.0.113.7')
+        ->not->toContain('Jane Browser')
+        ->and($ownEvent->description)->toBe('[deleted user] Login')
+        ->and($aboutEvent->metadata)->toBe(['member_id' => $deletedUser->id, 'member_name' => '[deleted user]', 'member_email' => '[deleted user]'])
+        ->and($aboutEvent->actor_email)->toBe($this->user->email)
+        ->and($unrelatedEvent->refresh()->metadata['member_name'])->toBe('Jane Doe');
 });
 
 test('does not record a user deletion when the password is wrong', function () {
@@ -229,7 +276,7 @@ test('records impersonation with the impersonating root user as actor', function
     expect($event->actor_id)->toBe(0)
         ->and($event->team_id)->toBe(0)
         ->and(data_get($event->metadata, 'target_user_id'))->toBe($targetUser->id)
-        ->and(data_get($event->metadata, 'target_user_email'))->toBe('impersonated@example.com');
+        ->and(accountAuditSerialized($event))->not->toContain('impersonated@example.com');
 });
 
 test('records an oauth identity linked to an existing user', function () {