Fix · nginx
Fix “MIME-sniffing protection” on nginx
Add: X-Content-Type-Options: nosniff
add_header X-Content-Type-Options "nosniff" always;Verify the fix
Re-run the MIME-sniffing protection check after deploying. Test config changes in staging first and keep a rollback: a wrong header can break a site faster than a missing one.
Other stacks: Apache · Caddy · Express / Node · Cloudflare