From 9eb64d39db71f60a06ad4d14c6aa3ed68616b574 Mon Sep 17 00:00:00 2001
From: Micha <micha@argv.nl>
Date: Mon, 15 Jun 2026 02:28:09 +0200
Subject: [PATCH] fix: return 403 on NoInstancesException

---
 lib/CalDAV/Backend/PDO.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/CalDAV/Backend/PDO.php b/lib/CalDAV/Backend/PDO.php
index 528fba3473..5750adb316 100644
--- a/lib/CalDAV/Backend/PDO.php
+++ b/lib/CalDAV/Backend/PDO.php
@@ -661,7 +661,11 @@ protected function getDenormalizedData($calendarData)
                     $lastOccurence = $firstOccurence;
                 }
             } else {
-                $it = new VObject\Recur\EventIterator($vObject, (string) $component->UID);
+                try {
+                    $it = new VObject\Recur\EventIterator($vObject, (string) $component->UID);
+                } catch (VObject\Recur\NoInstancesException $e) {
+                    throw new Forbidden($e->getMessage());
+                }
                 $maxDate = new \DateTime(self::MAX_DATE);
                 if ($it->isInfinite()) {
                     $lastOccurence = $maxDate->getTimeStamp();