diff --git a/src/Umbraco.Core/Services/FileServiceOperationBase.cs b/src/Umbraco.Core/Services/FileServiceOperationBase.cs
index 703465a1b3..e7b392d949 100644
--- a/src/Umbraco.Core/Services/FileServiceOperationBase.cs
+++ b/src/Umbraco.Core/Services/FileServiceOperationBase.cs
@@ -82,6 +82,11 @@ public abstract class FileServiceOperationBase<TRepository, TEntity, TOperationS
 
     protected async Task<Attempt<TEntity?, TOperationStatus>> HandleCreateAsync(string name, string? parentPath, string? content, Guid userKey)
     {
+        if (name.Contains('/'))
+        {
+            return Attempt.FailWithStatus<TEntity?, TOperationStatus>(InvalidName, default);
+        }
+
         using ICoreScope scope = ScopeProvider.CreateCoreScope();
 
         var path = GetFilePath(parentPath, name);
@@ -148,6 +153,11 @@ public abstract class FileServiceOperationBase<TRepository, TEntity, TOperationS
 
     protected async Task<Attempt<TEntity?, TOperationStatus>> HandleRenameAsync(string path, string newName, Guid userKey)
     {
+        if (newName.Contains('/'))
+        {
+            return Attempt.FailWithStatus<TEntity?, TOperationStatus>(InvalidName, default);
+        }
+
         using ICoreScope scope = ScopeProvider.CreateCoreScope();
 
         TEntity? entity = Repository.Get(path);