Index: typo3/sysext/cms/tslib/showpic.php
===================================================================
--- typo3/sysext/cms/tslib/showpic.php	(revision 9493)
+++ typo3/sysext/cms/tslib/showpic.php	(working copy)
@@ -198,7 +198,12 @@
 
 			// Check for the new content cache hash
 		if (strlen(t3lib_div::_GP('contentHash')) > 0) {
-			$this->content = t3lib_pageSelect::getHash($this->contentHash);
+			try {
+				$this->content = t3lib_pageSelect::getHash($this->contentHash);
+			}
+			catch (Exception $e) {
+				die('Parameter Error: Invalid parameter');
+			}
 			if (is_null($this->content)) {
 				die('Parameter Error: Content not available.');
 			}