GitHub user dosubot[bot] added a comment to the discussion: Login redirection 
does not use subpath prefix

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For secure embedding, Superset uses **guest tokens** (short-lived JWTs) 
combined with the `@superset-ui/embedded-sdk`. Here's the setup:

**1. Enable and configure in `superset_config.py`:**

```python
FEATURE_FLAGS = {
    "EMBEDDED_SUPERSET": True,
}

# CRITICAL: Change from the default in production
GUEST_TOKEN_JWT_SECRET = "your-strong-secret-here"  # Generate with: openssl 
rand -base64 42
GUEST_TOKEN_JWT_EXP_SECONDS = 300  # 5 min default
GUEST_ROLE_NAME = "Public"  # Role assigned to guest users

# Allow your app domain to embed via iframe
TALISMAN_CONFIG = {
    "content_security_policy": {
        "frame-ancestors": ["'self'", "https://myapp.com";],
    },
}
```

[[1]](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset/config.py#L498)
 
[[2]](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset/config.py#L1816-L1817)

**2. Enable embedding on the dashboard:**

Via the Superset UI: open the dashboard → "..." menu → "Embed Dashboard" → 
configure allowed domains.

Or via API:

```
POST /api/v1/dashboard/<id>/embedded
{"allowed_domains": ["https://myapp.com"]}
```

[[3]](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset/dashboards/api.py#L1644-L1718)

**3. Your backend generates guest tokens:**

```python
# POST to Superset from YOUR backend
response = requests.post(
    "https://superset.example.com/api/v1/security/guest_token/";,
    json={
        "user": {"username": "guest_user", "first_name": "Guest", "last_name": 
"User"},
        "resources": [{"type": "dashboard", "id": "your-dashboard-uuid"}],
        "rls": [{"dataset": 42, "clause": "company_id='123'"}]  # optional RLS
    },
    headers={"Authorization": f"Bearer {YOUR_SUPERSET_API_TOKEN}"}
)
token = response.json()["token"]
```

[[4]](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset/security/api.py#L137-L196)

**4. Your frontend uses the SDK:**

```bash
npm install @superset-ui/embedded-sdk
```

```javascript
import { embedDashboard } from "@superset-ui/embedded-sdk";

embedDashboard({
  id: "your-dashboard-uuid",
  supersetDomain: "https://superset.example.com";,
  mountPoint: document.getElementById("dashboard-container"),
  fetchGuestToken: () => fetch("/api/get-guest-token").then(r => 
r.json()).then(d => d.token),
  dashboardUiConfig: { hideTitle: true, filters: { expanded: true } },
});
```

[[5]](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset-embedded-sdk/README.md#L43-L67)

The SDK creates a sandboxed iframe, passes the token via the `X-GuestToken` 
header, and **automatically refreshes** tokens before they expire 
[[6]](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset-embedded-sdk/src/index.ts#L224-L230).

**Key security features:**

- Tokens are short-lived (5 min default) and scoped to specific dashboards
- Optional **Row Level Security** filters data per-user via the `rls` field — 
always include the `dataset` ID to scope it properly 
[[7]](https://github.com/apache/superset/discussions/41558#discussioncomment-17480327)
- Domain whitelisting prevents unauthorized sites from embedding
- Iframe sandboxing restricts capabilities 
[[8]](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset-embedded-sdk/src/index.ts#L165-L175)

**Important note:** Guest token embedding only supports **dashboards**, not 
individual charts. To embed a chart securely, wrap it in a single-chart 
dashboard 
[[9]](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset/security/guest_token.py#L31-L32).


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GitHub link: 
https://github.com/apache/superset/discussions/40082#discussioncomment-17511528

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