GitHub user dosubot[bot] added a comment to the discussion: Unsafe eval error

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<!-- Answer -->
The issue is that **`'strict-dynamic'` and `'unsafe-eval'` are mutually 
exclusive** per the CSP spec. When `'strict-dynamic'` is present in 
`script-src`, browsers ignore `'unsafe-eval'`, `'unsafe-inline'`, and `'self'` 
— so your `'unsafe-eval'` is effectively a no-op even though it's listed 
[[1]](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset/config.py#L1644-L1674).

You need to pick one approach or the other:

**Option A – Keep `'strict-dynamic'` (more secure, recommended):**
Remove `'unsafe-eval'` and rely on nonces. This is the default Superset 
production config. If you're hitting eval errors, it means some feature you're 
using (e.g., custom JS tooltips in deck.gl charts) requires eval — you'd need 
to avoid that feature.

**Option B – Drop `'strict-dynamic'` and allow eval (less secure):**

```python
TALISMAN_CONFIG = {
    "content_security_policy": {
        "default-src": ["'self'"],
        "script-src": ["'self'", "'unsafe-inline'", "'unsafe-eval'"],
        # ...other directives...
    },
    "content_security_policy_nonce_in": ["script-src"],
    "force_https": False,
}
```

This is essentially what Superset's built-in `TALISMAN_DEV_CONFIG` does — it 
uses `'unsafe-eval'` **without** `'strict-dynamic'` 
[[2]](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset/config.py#L1675-L1703).
 This will fix the eval error but weakens your CSP.

Also worth checking: is a reverse proxy (Nginx, Cloudflare, etc.) injecting its 
own `Content-Security-Policy` header? If so, it would override what Talisman 
sends, and you'd need to fix it there instead.


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GitHub link: 
https://github.com/apache/superset/discussions/42423#discussioncomment-17777582

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