Security Headers List: 6 Headers Every Site Needs in 2026
Originally published on Sitecheckly . A robust security headers list includes Content-Security-Policy, Strict-Transport-Security, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy. These HTTP response headers protect against cross-site scripting (XSS), clickjacking, MIME sniffing, and unwanted data leaks. Implementing them requires adding simple response directives…
The article highlights the importance of implementing security headers on websites in 2026 to protect against various web vulnerabilities such as cross-site scripting (XSS), clickjacking, MIME sniffing, and data leaks. The six essential security headers recommended for production websites are Strict-Transport-Security (HSTS), Content-Security-Policy (CSP), X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy.
These headers act as a defense layer within the client browser, reducing the attack surface without altering application code. Missing security headers can expose users to common web vulnerabilities, and despite their importance, 84% of the 97 sites audited on Sitecheckly in the last 90 days were found to be missing these headers.
Brief written by urgent.news from Dev.to's own syndicated text. Machine-written — may contain errors; check the original before relying on it.
