diff --git a/nuget/helpers/lib/NuGetUpdater/NuGetUpdater.Core.Test/Utilities/MSBuildHelperTests.cs b/nuget/helpers/lib/NuGetUpdater/NuGetUpdater.Core.Test/Utilities/MSBuildHelperTests.cs
index d4899e4de6..97cb972ae0 100644
--- a/nuget/helpers/lib/NuGetUpdater/NuGetUpdater.Core.Test/Utilities/MSBuildHelperTests.cs
+++ b/nuget/helpers/lib/NuGetUpdater/NuGetUpdater.Core.Test/Utilities/MSBuildHelperTests.cs
@@ -646,5 +646,13 @@ Using Msbuild from '/usr/local/dotnet/current/sdk/9.0.311'.
             // expectedError
             new DependencyFileNotParseable("/path/to/packages.config", "Unexpected XML declaration. The XML declaration must be the first node in the document, and no whitespace characters are allowed to appear before it. Line 1, position 5.")
         ];
+
+        yield return
+        [
+            // output
+            "Circular dependency detected 'ReactiveProperty 3.6.0 => System.Reactive 3.1.1 => System.Reactive.PlatformServices 6.1.0 => System.Reactive 3.1.1'.",
+            // expectedError
+            new UnknownError(new Exception("Circular dependency detected"), "TEST-JOB-ID"),
+        ];
     }
 }
diff --git a/nuget/helpers/lib/NuGetUpdater/NuGetUpdater.Core/Utilities/MSBuildHelper.cs b/nuget/helpers/lib/NuGetUpdater/NuGetUpdater.Core/Utilities/MSBuildHelper.cs
index 9c9424eee1..5d098e5d34 100644
--- a/nuget/helpers/lib/NuGetUpdater/NuGetUpdater.Core/Utilities/MSBuildHelper.cs
+++ b/nuget/helpers/lib/NuGetUpdater/NuGetUpdater.Core/Utilities/MSBuildHelper.cs
@@ -646,6 +646,7 @@ internal static void ThrowOnError(string output)
         ThrowOnBadResponse(output);
         ThrowOnUnparseableFile(output);
         ThrowOnMultipleProjectsForPackagesConfig(output);
+        ThrowOnCircularDependency(output);
     }
 
     private static void ThrowOnUnauthenticatedFeed(string stdout)
@@ -788,6 +789,15 @@ private static void ThrowOnMultipleProjectsForPackagesConfig(string output)
         }
     }
 
+    private static void ThrowOnCircularDependency(string output)
+    {
+        var pattern = new Regex(@"Circular dependency detected '.*'");
+        if (pattern.IsMatch(output))
+        {
+            throw new Exception("Circular dependency detected");
+        }
+    }
+
     internal static bool TryGetGlobalJsonPath(string repoRootPath, string workspacePath, [NotNullWhen(returnValue: true)] out string? globalJsonPath)
     {
         globalJsonPath = PathHelper.GetFileInDirectoryOrParent(workspacePath, repoRootPath, "global.json", caseSensitive: false);