From 8cb0d4eba7aaabf695f3c625971aad0a77820848 Mon Sep 17 00:00:00 2001
From: David Negstad <David.Negstad@microsoft.com>
Date: Thu, 8 Jan 2026 17:57:05 -0800
Subject: [PATCH] Escape backslashes in path string

---
 src/Aspire.Hosting.JavaScript/JavaScriptHostingExtensions.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Aspire.Hosting.JavaScript/JavaScriptHostingExtensions.cs b/src/Aspire.Hosting.JavaScript/JavaScriptHostingExtensions.cs
index 9455f36766a..3380019354a 100644
--- a/src/Aspire.Hosting.JavaScript/JavaScriptHostingExtensions.cs
+++ b/src/Aspire.Hosting.JavaScript/JavaScriptHostingExtensions.cs
@@ -593,7 +593,7 @@ public static IResourceBuilder<ViteAppResource> AddViteApp(this IDistributedAppl
                         // If we are expecting to run the vite app with HTTPS termination, generate an Aspire specific Vite config file that can mutate the user's original config
                         var aspireConfig = AspireViteConfig
                             .Replace(AspireViteRelativeConfigToken, relativeConfigPath.Replace("\\", "/"), StringComparison.Ordinal)
-                            .Replace(AspireViteAbsoluteConfigToken, absoluteConfigPath, StringComparison.Ordinal);
+                            .Replace(AspireViteAbsoluteConfigToken, absoluteConfigPath.Replace("\\", "\\\\"), StringComparison.Ordinal);
                         var aspireConfigPath = Path.Join(appDirectory, "node_modules", ".bin", $"aspire.{Path.GetFileName(configTarget)}");
                         File.WriteAllText(aspireConfigPath, aspireConfig);