diff --git a/authentik/core/templates/base/header_js.html b/authentik/core/templates/base/header_js.html
index 944bf587edbc..9e75d96c4dbe 100644
--- a/authentik/core/templates/base/header_js.html
+++ b/authentik/core/templates/base/header_js.html
@@ -11,6 +11,7 @@
         build: "{{ build }}",
         api: {
             base: "{{ base_url }}",
+            relBase: "{{ base_url_rel }}",
         },
     };
     window.addEventListener("DOMContentLoaded", function () {
diff --git a/authentik/core/views/interface.py b/authentik/core/views/interface.py
index 20fddf860651..a90ba5fc55a0 100644
--- a/authentik/core/views/interface.py
+++ b/authentik/core/views/interface.py
@@ -53,6 +53,7 @@ def get_context_data(self, **kwargs: Any) -> dict[str, Any]:
         kwargs["build"] = get_build_hash()
         kwargs["url_kwargs"] = self.kwargs
         kwargs["base_url"] = self.request.build_absolute_uri(CONFIG.get("web.path", "/"))
+        kwargs["base_url_rel"] = CONFIG.get("web.path", "/")
         return super().get_context_data(**kwargs)