From 355cf2a3dea136e66006d2e692a2a20bfc474b24 Mon Sep 17 00:00:00 2001
From: gurkanguran <gurkanguran@gmail.com>
Date: Wed, 8 Mar 2023 11:48:24 +0100
Subject: [PATCH] Validate JsonElement value to prevent exception during json
 serialization (#3777)

---
 .../Serialization/Converters/InputJsonConverter.cs             | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/modules/Elsa.Workflows.Management/Serialization/Converters/InputJsonConverter.cs b/src/modules/Elsa.Workflows.Management/Serialization/Converters/InputJsonConverter.cs
index ce097a888..45fba661c 100644
--- a/src/modules/Elsa.Workflows.Management/Serialization/Converters/InputJsonConverter.cs
+++ b/src/modules/Elsa.Workflows.Management/Serialization/Converters/InputJsonConverter.cs
@@ -39,6 +39,9 @@ public class InputJsonConverter<T> : JsonConverter<Input<T>>
 
             if (!expressionElement.TryGetProperty("type", out var expressionTypeNameElement))
                 return default!;
+            
+            if (!expressionElement.TryGetProperty("value", out _))
+                return default!;
 
             var expressionTypeName = expressionTypeNameElement.GetString() ?? "Literal";
             var expressionSyntaxDescriptor = _expressionSyntaxRegistry.Find(expressionTypeName);