diff --git a/hermes_cli/web_server.py b/hermes_cli/web_server.py
index 3f12ed183..f63aca6fc 100644
--- a/hermes_cli/web_server.py
+++ b/hermes_cli/web_server.py
@@ -515,6 +515,57 @@ async def auth_middleware(request: Request, call_next):
     return await call_next(request)
 
 
+@app.middleware("http")
+async def _plugin_api_runtime_gate(request: Request, call_next):
+    """Block requests to disabled plugin API routes at request time.
+
+    :func:`_mount_plugin_api_routes` gates at import time, but if a plugin
+    is disabled *after* the dashboard is already running, its FastAPI router
+    remains mounted until restart.  This middleware enforces the enabled/
+    disabled policy on every request to ``/api/plugins/{name}/...`` so that
+    runtime config changes take effect immediately.
+    """
+    path = request.url.path
+    if path.startswith("/api/plugins/"):
+        # Extract plugin name from /api/plugins/<name>/...
+        parts = path.split("/")
+        # parts: ['', 'api', 'plugins', '<name>', ...]
+        if len(parts) >= 4:
+            plugin_name = parts[3]
+            if plugin_name:
+                try:
+                    from hermes_cli.plugins_cmd import (
+                        _get_enabled_set,
+                        _get_disabled_set,
+                    )
+                    enabled_set = _get_enabled_set()
+                    disabled_set = _get_disabled_set()
+                except Exception:
+                    enabled_set = set()
+                    disabled_set = set()
+                # Determine plugin source.  Check the cached plugin list;
+                # if not found, assume user plugin (safe default — blocks).
+                plugins = _get_dashboard_plugins()
+                plugin = next(
+                    (p for p in plugins if p.get("name") == plugin_name),
+                    None,
+                )
+                source = plugin.get("source") if plugin else "user"
+                if source == "user":
+                    if plugin_name in disabled_set or plugin_name not in enabled_set:
+                        return JSONResponse(
+                            status_code=404,
+                            content={"detail": "Plugin not found"},
+                        )
+                elif source == "bundled":
+                    if plugin_name in disabled_set:
+                        return JSONResponse(
+                            status_code=404,
+                            content={"detail": "Plugin not found"},
+                        )
+    return await call_next(request)
+
+
 @app.middleware("http")
 async def _token_auth_seam(request: Request, call_next):
     """Outermost auth seam: non-interactive bearer-token auth for opted-in routes.
@@ -13793,17 +13844,21 @@ async def serve_plugin_asset(plugin_name: str, file_path: str):
     if not plugin:
         raise HTTPException(status_code=404, detail="Plugin not found")
 
-    # Gate: user plugins must be enabled to serve assets.
+    # Gate: user plugins must be enabled to serve assets;
+    # bundled plugins must not be explicitly disabled.
+    try:
+        from hermes_cli.plugins_cmd import _get_enabled_set, _get_disabled_set
+        enabled_set = _get_enabled_set()
+        disabled_set = _get_disabled_set()
+    except Exception:
+        enabled_set = set()
+        disabled_set = set()
     if plugin.get("source") == "user":
-        try:
-            from hermes_cli.plugins_cmd import _get_enabled_set, _get_disabled_set
-            enabled_set = _get_enabled_set()
-            disabled_set = _get_disabled_set()
-        except Exception:
-            enabled_set = set()
-            disabled_set = set()
         if plugin_name in disabled_set or plugin_name not in enabled_set:
             raise HTTPException(status_code=404, detail="Plugin not found")
+    elif plugin.get("source") == "bundled":
+        if plugin_name in disabled_set:
+            raise HTTPException(status_code=404, detail="Plugin not found")
 
     base = Path(plugin["_dir"])
     target = (base / file_path).resolve()
diff --git a/tests/hermes_cli/test_plugin_runtime_disable_gate.py b/tests/hermes_cli/test_plugin_runtime_disable_gate.py
new file mode 100644
index 000000000..6889f5ddf
--- /dev/null
+++ b/tests/hermes_cli/test_plugin_runtime_disable_gate.py
@@ -0,0 +1,394 @@
+"""Regression tests for runtime plugin disable gating.
+
+Covers two residual bypasses addressed in the PR:
+
+1. Plugin API routes mounted at startup remain callable even after the
+   plugin is added to ``plugins.disabled`` at runtime.  The new
+   ``_plugin_api_runtime_gate`` middleware blocks these requests.
+
+2. Bundled plugin assets were served from the unauthenticated
+   ``/dashboard-plugins/{name}/{path}`` route even when the bundled
+   plugin was in ``plugins.disabled``.  The updated ``serve_plugin_asset``
+   now applies the disabled check to bundled plugins too.
+"""
+from __future__ import annotations
+
+import json
+from pathlib import Path
+from unittest.mock import patch, AsyncMock
+
+import pytest
+
+from hermes_cli import web_server
+
+
+@pytest.fixture(autouse=True)
+def _reset_plugin_cache():
+    """Bust the plugin cache before and after each test."""
+    web_server._dashboard_plugins_cache = None
+    yield
+    web_server._dashboard_plugins_cache = None
+
+
+@pytest.fixture
+def test_client(monkeypatch, tmp_path):
+    """Set up a Starlette TestClient with auth bypassed."""
+    try:
+        from starlette.testclient import TestClient
+    except ImportError:
+        pytest.skip("fastapi/starlette not installed")
+
+    from hermes_cli.web_server import app, _SESSION_HEADER_NAME, _SESSION_TOKEN
+
+    # Isolate HERMES_HOME so config reads go to our tmp.
+    monkeypatch.setenv("HERMES_HOME", str(tmp_path / "home"))
+    (tmp_path / "home").mkdir(parents=True)
+
+    client = TestClient(app)
+    client.headers[_SESSION_HEADER_NAME] = _SESSION_TOKEN
+    return client
+
+
+# ---------------------------------------------------------------------------
+# Helpers
+# ---------------------------------------------------------------------------
+
+def _make_user_plugin(tmp_path, name="hot"):
+    """Create a minimal user plugin with a JS asset."""
+    dashboard_dir = tmp_path / "plugins" / name / "dashboard"
+    dashboard_dir.mkdir(parents=True)
+    dist_dir = dashboard_dir / "dist"
+    dist_dir.mkdir()
+    (dist_dir / "index.js").write_text("console.log('hello');")
+    (dashboard_dir / "manifest.json").write_text(json.dumps({
+        "name": name,
+        "label": name.title(),
+        "entry": "dist/index.js",
+    }))
+    return dashboard_dir
+
+
+def _make_bundled_plugin(tmp_path, name="bundledx"):
+    """Create a minimal bundled plugin with a JS asset."""
+    dashboard_dir = tmp_path / "bundled" / name / "dashboard"
+    dashboard_dir.mkdir(parents=True)
+    dist_dir = dashboard_dir / "dist"
+    dist_dir.mkdir()
+    (dist_dir / "index.js").write_text("console.log('bundled');")
+    (dashboard_dir / "manifest.json").write_text(json.dumps({
+        "name": name,
+        "label": name.title(),
+        "entry": "dist/index.js",
+    }))
+    return dashboard_dir
+
+
+# ---------------------------------------------------------------------------
+# Test 1: Runtime-disabled user plugin API routes return 404
+# ---------------------------------------------------------------------------
+
+
+class TestPluginApiRuntimeGate:
+    """After a user plugin is disabled at runtime, its mounted API routes
+    must return 404 — not 200 — even though the router was already
+    included at startup.  The _plugin_api_runtime_gate middleware enforces
+    this at request time."""
+
+    @pytest.mark.asyncio
+    async def test_middleware_blocks_disabled_user_plugin(self):
+        """Middleware returns 404 for a user plugin added to disabled set."""
+        from starlette.requests import Request
+        from starlette.responses import JSONResponse
+
+        fake_plugin = {
+            "name": "hot",
+            "source": "user",
+        }
+
+        # Simulate a request to /api/plugins/hot/probe
+        scope = {
+            "type": "http",
+            "method": "GET",
+            "path": "/api/plugins/hot/probe",
+            "query_string": b"",
+            "headers": [],
+        }
+        request = Request(scope)
+
+        call_next = AsyncMock(return_value=JSONResponse({"ok": True}))
+
+        with patch.object(web_server, "_get_dashboard_plugins", return_value=[fake_plugin]), \
+             patch("hermes_cli.plugins_cmd._get_enabled_set", return_value={"hot"}), \
+             patch("hermes_cli.plugins_cmd._get_disabled_set", return_value={"hot"}):
+            response = await web_server._plugin_api_runtime_gate(request, call_next)
+
+        assert response.status_code == 404
+        call_next.assert_not_called()
+
+    @pytest.mark.asyncio
+    async def test_middleware_blocks_unenabled_user_plugin(self):
+        """Middleware returns 404 when user plugin not in enabled set."""
+        from starlette.requests import Request
+        from starlette.responses import JSONResponse
+
+        fake_plugin = {
+            "name": "hot",
+            "source": "user",
+        }
+
+        scope = {
+            "type": "http",
+            "method": "GET",
+            "path": "/api/plugins/hot/probe",
+            "query_string": b"",
+            "headers": [],
+        }
+        request = Request(scope)
+
+        call_next = AsyncMock(return_value=JSONResponse({"ok": True}))
+
+        with patch.object(web_server, "_get_dashboard_plugins", return_value=[fake_plugin]), \
+             patch("hermes_cli.plugins_cmd._get_enabled_set", return_value=set()), \
+             patch("hermes_cli.plugins_cmd._get_disabled_set", return_value=set()):
+            response = await web_server._plugin_api_runtime_gate(request, call_next)
+
+        assert response.status_code == 404
+        call_next.assert_not_called()
+
+    @pytest.mark.asyncio
+    async def test_middleware_passes_enabled_user_plugin(self):
+        """Middleware passes through for an enabled user plugin."""
+        from starlette.requests import Request
+        from starlette.responses import JSONResponse
+
+        fake_plugin = {
+            "name": "hot",
+            "source": "user",
+        }
+
+        scope = {
+            "type": "http",
+            "method": "GET",
+            "path": "/api/plugins/hot/probe",
+            "query_string": b"",
+            "headers": [],
+        }
+        request = Request(scope)
+
+        expected_resp = JSONResponse({"ok": True})
+        call_next = AsyncMock(return_value=expected_resp)
+
+        with patch.object(web_server, "_get_dashboard_plugins", return_value=[fake_plugin]), \
+             patch("hermes_cli.plugins_cmd._get_enabled_set", return_value={"hot"}), \
+             patch("hermes_cli.plugins_cmd._get_disabled_set", return_value=set()):
+            response = await web_server._plugin_api_runtime_gate(request, call_next)
+
+        assert response is expected_resp
+        call_next.assert_called_once()
+
+    @pytest.mark.asyncio
+    async def test_middleware_blocks_disabled_bundled_plugin(self):
+        """Middleware returns 404 for a bundled plugin in disabled set."""
+        from starlette.requests import Request
+        from starlette.responses import JSONResponse
+
+        fake_plugin = {
+            "name": "bundledx",
+            "source": "bundled",
+        }
+
+        scope = {
+            "type": "http",
+            "method": "GET",
+            "path": "/api/plugins/bundledx/probe",
+            "query_string": b"",
+            "headers": [],
+        }
+        request = Request(scope)
+
+        call_next = AsyncMock(return_value=JSONResponse({"ok": True}))
+
+        with patch.object(web_server, "_get_dashboard_plugins", return_value=[fake_plugin]), \
+             patch("hermes_cli.plugins_cmd._get_enabled_set", return_value=set()), \
+             patch("hermes_cli.plugins_cmd._get_disabled_set", return_value={"bundledx"}):
+            response = await web_server._plugin_api_runtime_gate(request, call_next)
+
+        assert response.status_code == 404
+        call_next.assert_not_called()
+
+    @pytest.mark.asyncio
+    async def test_middleware_passes_enabled_bundled_plugin(self):
+        """Middleware passes through for a bundled plugin not in disabled set."""
+        from starlette.requests import Request
+        from starlette.responses import JSONResponse
+
+        fake_plugin = {
+            "name": "bundledx",
+            "source": "bundled",
+        }
+
+        scope = {
+            "type": "http",
+            "method": "GET",
+            "path": "/api/plugins/bundledx/probe",
+            "query_string": b"",
+            "headers": [],
+        }
+        request = Request(scope)
+
+        expected_resp = JSONResponse({"ok": True})
+        call_next = AsyncMock(return_value=expected_resp)
+
+        with patch.object(web_server, "_get_dashboard_plugins", return_value=[fake_plugin]), \
+             patch("hermes_cli.plugins_cmd._get_enabled_set", return_value=set()), \
+             patch("hermes_cli.plugins_cmd._get_disabled_set", return_value=set()):
+            response = await web_server._plugin_api_runtime_gate(request, call_next)
+
+        assert response is expected_resp
+        call_next.assert_called_once()
+
+    @pytest.mark.asyncio
+    async def test_middleware_passes_non_plugin_api_routes(self):
+        """Middleware ignores non-plugin API routes."""
+        from starlette.requests import Request
+        from starlette.responses import JSONResponse
+
+        scope = {
+            "type": "http",
+            "method": "GET",
+            "path": "/api/status",
+            "query_string": b"",
+            "headers": [],
+        }
+        request = Request(scope)
+
+        expected_resp = JSONResponse({"ok": True})
+        call_next = AsyncMock(return_value=expected_resp)
+
+        response = await web_server._plugin_api_runtime_gate(request, call_next)
+
+        assert response is expected_resp
+        call_next.assert_called_once()
+
+    @pytest.mark.asyncio
+    async def test_middleware_unknown_plugin_defaults_to_user_blocks(self):
+        """Unknown plugin name (not in discovery cache) is treated as user
+        plugin and blocked when not enabled."""
+        from starlette.requests import Request
+        from starlette.responses import JSONResponse
+
+        scope = {
+            "type": "http",
+            "method": "GET",
+            "path": "/api/plugins/unknown/action",
+            "query_string": b"",
+            "headers": [],
+        }
+        request = Request(scope)
+
+        call_next = AsyncMock(return_value=JSONResponse({"ok": True}))
+
+        with patch.object(web_server, "_get_dashboard_plugins", return_value=[]), \
+             patch("hermes_cli.plugins_cmd._get_enabled_set", return_value=set()), \
+             patch("hermes_cli.plugins_cmd._get_disabled_set", return_value=set()):
+            response = await web_server._plugin_api_runtime_gate(request, call_next)
+
+        assert response.status_code == 404
+        call_next.assert_not_called()
+
+
+# ---------------------------------------------------------------------------
+# Test 2: Disabled bundled plugin assets return 404
+# ---------------------------------------------------------------------------
+
+
+class TestBundledPluginAssetGate:
+    """Bundled plugins in ``plugins.disabled`` must have their static
+    assets blocked — not just hidden from the listing endpoint."""
+
+    def test_bundled_asset_returns_404_when_disabled(self, test_client, tmp_path, monkeypatch):
+        """A disabled bundled plugin's JS asset must return 404."""
+        plugin_dir = _make_bundled_plugin(tmp_path, "bundledx")
+
+        fake_plugin = {
+            "name": "bundledx",
+            "label": "Bundledx",
+            "source": "bundled",
+            "entry": "dist/index.js",
+            "_dir": str(plugin_dir),
+        }
+
+        with patch.object(web_server, "_get_dashboard_plugins", return_value=[fake_plugin]):
+            # Sanity: asset is served when not disabled.
+            with patch(
+                "hermes_cli.plugins_cmd._get_enabled_set", return_value=set()
+            ), patch(
+                "hermes_cli.plugins_cmd._get_disabled_set", return_value=set()
+            ):
+                resp = test_client.get("/dashboard-plugins/bundledx/dist/index.js")
+                assert resp.status_code == 200, (
+                    "Sanity: bundled plugin asset should be served when not disabled"
+                )
+
+            # Disable it.
+            with patch(
+                "hermes_cli.plugins_cmd._get_enabled_set", return_value=set()
+            ), patch(
+                "hermes_cli.plugins_cmd._get_disabled_set", return_value={"bundledx"}
+            ):
+                resp = test_client.get("/dashboard-plugins/bundledx/dist/index.js")
+                assert resp.status_code == 404, (
+                    "Disabled bundled plugin asset must return 404"
+                )
+
+    def test_bundled_asset_served_when_not_disabled(self, test_client, tmp_path, monkeypatch):
+        """Bundled plugin assets are served normally when not in disabled set."""
+        plugin_dir = _make_bundled_plugin(tmp_path, "goodbundled")
+
+        fake_plugin = {
+            "name": "goodbundled",
+            "label": "Good Bundled",
+            "source": "bundled",
+            "entry": "dist/index.js",
+            "_dir": str(plugin_dir),
+        }
+
+        with patch.object(web_server, "_get_dashboard_plugins", return_value=[fake_plugin]):
+            with patch(
+                "hermes_cli.plugins_cmd._get_enabled_set", return_value=set()
+            ), patch(
+                "hermes_cli.plugins_cmd._get_disabled_set", return_value=set()
+            ):
+                resp = test_client.get("/dashboard-plugins/goodbundled/dist/index.js")
+                assert resp.status_code == 200
+
+    def test_user_plugin_asset_still_gated(self, test_client, tmp_path, monkeypatch):
+        """User plugins still require enabled set membership for assets."""
+        plugin_dir = _make_user_plugin(tmp_path, "userplugin")
+
+        fake_plugin = {
+            "name": "userplugin",
+            "label": "User Plugin",
+            "source": "user",
+            "entry": "dist/index.js",
+            "_dir": str(plugin_dir),
+        }
+
+        with patch.object(web_server, "_get_dashboard_plugins", return_value=[fake_plugin]):
+            # Not in enabled set → 404.
+            with patch(
+                "hermes_cli.plugins_cmd._get_enabled_set", return_value=set()
+            ), patch(
+                "hermes_cli.plugins_cmd._get_disabled_set", return_value=set()
+            ):
+                resp = test_client.get("/dashboard-plugins/userplugin/dist/index.js")
+                assert resp.status_code == 404
+
+            # In enabled set → 200.
+            with patch(
+                "hermes_cli.plugins_cmd._get_enabled_set", return_value={"userplugin"}
+            ), patch(
+                "hermes_cli.plugins_cmd._get_disabled_set", return_value=set()
+            ):
+                resp = test_client.get("/dashboard-plugins/userplugin/dist/index.js")
+                assert resp.status_code == 200