diff --git a/superset/openapi/manager.py b/superset/openapi/manager.py
index 7bc6a1a04db..a905eae6278 100644
--- a/superset/openapi/manager.py
+++ b/superset/openapi/manager.py
@@ -48,6 +48,19 @@ def normalize_app_root(app_root: str | None) -> str:
     return app_root.rstrip("/")
 
 
+def resolve_url_prefix() -> str:
+    """Resolve the URL prefix used to build OpenAPI/Swagger links.
+
+    Prefer the request's script root so reverse-proxy prefixes exposed via
+    ``X-Forwarded-Prefix`` / ``SCRIPT_NAME`` keep working (this is what FAB's
+    stock Swagger view does), and fall back to a normalized ``APPLICATION_ROOT``
+    when no script root is present.
+    """
+    return request.script_root or normalize_app_root(
+        current_app.config.get("APPLICATION_ROOT")
+    )
+
+
 def resolver(schema: Any) -> str:
     schema_cls = resolve_schema_cls(schema)
     name = schema_cls.__name__
@@ -100,8 +113,8 @@ class SupersetOpenApi(BaseApi):
 
     @staticmethod
     def _create_api_spec(version: str) -> APISpec:
-        app_root = normalize_app_root(current_app.config.get("APPLICATION_ROOT", "/"))
-        default_server = {"url": request.host_url.rstrip("/") + (app_root or "/")}
+        prefix = resolve_url_prefix()
+        default_server = {"url": request.host_url.rstrip("/") + (prefix or "/")}
         servers = current_app.config.get("FAB_OPENAPI_SERVERS", [default_server])
         return APISpec(
             title=current_app.appbuilder.app_name,
@@ -121,8 +134,7 @@ class SupersetSwaggerView(BaseView):
     @expose("/<version>")
     @has_access
     def show(self, version: str) -> FlaskResponse:
-        app_root = normalize_app_root(current_app.config.get("APPLICATION_ROOT"))
-        openapi_uri = (app_root + self.openapi_uri).format(version)
+        openapi_uri = (resolve_url_prefix() + self.openapi_uri).format(version)
         return self.render_template(
             current_app.config.get(
                 "FAB_API_SWAGGER_TEMPLATE", "appbuilder/swagger/swagger.html"
diff --git a/tests/unit_tests/openapi/test_manager.py b/tests/unit_tests/openapi/test_manager.py
index f7fbb4d4631..ba4c2cd3497 100644
--- a/tests/unit_tests/openapi/test_manager.py
+++ b/tests/unit_tests/openapi/test_manager.py
@@ -15,9 +15,14 @@
 # specific language governing permissions and limitations
 # under the License.
 import pytest
+from flask import Flask
 from marshmallow import Schema
 
-from superset.openapi.manager import normalize_app_root, resolver
+from superset.openapi.manager import (
+    normalize_app_root,
+    resolve_url_prefix,
+    resolver,
+)
 
 
 @pytest.mark.parametrize(
@@ -35,6 +40,29 @@ def test_normalize_app_root(app_root: str | None, expected: str) -> None:
     assert normalize_app_root(app_root) == expected
 
 
+def test_resolve_url_prefix_prefers_script_root() -> None:
+    # A reverse-proxy prefix (X-Forwarded-Prefix / SCRIPT_NAME) must win over
+    # APPLICATION_ROOT so FAB's script_root behavior isn't dropped.
+    app = Flask(__name__)
+    app.config["APPLICATION_ROOT"] = "/config-root"
+    with app.test_request_context(environ_overrides={"SCRIPT_NAME": "/proxy-root"}):
+        assert resolve_url_prefix() == "/proxy-root"
+
+
+def test_resolve_url_prefix_falls_back_to_app_root() -> None:
+    app = Flask(__name__)
+    app.config["APPLICATION_ROOT"] = "/config-root"
+    with app.test_request_context():
+        assert resolve_url_prefix() == "/config-root"
+
+
+def test_resolve_url_prefix_empty_when_neither_set() -> None:
+    app = Flask(__name__)
+    app.config["APPLICATION_ROOT"] = "/"
+    with app.test_request_context():
+        assert resolve_url_prefix() == ""
+
+
 def test_resolver_strips_schema_suffix() -> None:
     class FooSchema(Schema):
         pass