HTTP Security Header
X-Content-Type-Options
Prevents the browser from MIME-sniffing a response away from the declared content-type, which reduces exposure to drive-by downloads and XSS.
Configuration Snapshot
- Header Name
- X-Content-Type-Options
- Primary Mitigation
- MIME-Sniffing Attacks, Drive-by Downloads
Example Configuration
X-Content-Type-Options: nosniff
Implementation Best Practices
- Always set to nosniff
- Ensure backend services correctly set the Content-Type header for all assets
Audit Your Configuration
Properly implementing X-Content-Type-Options is critical for achieving a robust security posture. A misconfigured header can leave your application exposed to client-side attacks or accidentally block legitimate functionality. Use our Security Headers auditing tool to evaluate your live production setup.
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