securitywarning impacttier 1✓ verified99% confidence
Site missing X-Content-Type-Options header
from security agent · cross-site verified across production deployments
The trigger
Site missing X-Content-Type-Options header
The fix
Add X-Content-Type-Options: nosniff to prevent MIME-type sniffing attacks. Single-line, no downside.
Code example
X-Content-Type-Options: nosniffRelated patterns
securitywarning
Site missing Permissions-Policy header
securitywarning
Site missing Referrer-Policy header
securitycritical
Site missing X-Frame-Options header
securitycritical
Site missing HSTS (Strict-Transport-Security) header
securitycritical
Site missing Content-Security-Policy header
securityhigh
prefix_match_middleware_bug
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