CORS and cross-origin security monitoring
What it is
CORS (Cross-Origin Resource Sharing) controls which origins can access your API or assets from the browser. Headers like Access-Control-Allow-Origin, Allow-Credentials, and COEP/COOP/CORP define the policy. Misconfiguration can allow unauthorized sites to read or abuse your resources.
Why it matters
Overly permissive CORS (e.g. Allow-Origin: *) or wrong credential handling can expose data to malicious sites. Tight, correct CORS is essential for APIs and authenticated endpoints. Monitoring catches drift and mistakes.
How Barrion checks it
Barrion inspects CORS-related response headers (Access-Control-Allow-Origin, Allow-Credentials, Allow-Headers, Max-Age, and COEP/COOP/CORP). We report permissive or inconsistent settings and suggest safer configurations. All checks are passive.
