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ZeriFlow Journal

Security guides your team can ship this week

Actionable articles on TLS, headers, CSP, privacy, and practical hardening for modern web apps.

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Web Security

X-Frame-Options vs CSP frame-ancestors: Which Header to Use in 2026?

Mar 22, 2026·9 min

X-Frame-Options and CSP's frame-ancestors directive both prevent clickjacking by controlling how your page can be embedded in iframes. But they are not equivalent — one is a legacy header, the other is the modern standard. This guide explains the differences, which to use, and why you should set both.

#x-frame-options#clickjacking-protection#frame-ancestors-csp
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