HTTP headers
Cookie HTTP Header Meaning
Cookie sends stored cookie values to the server.
Meaning
The browser is attaching name-value pairs that match the request URL and cookie rules.
Where it appears
Browsers send it for sessions, preferences, experiments, and other cookie-backed state.
What to check
Check path, domain, SameSite, Secure, and whether sensitive data is being sent unnecessarily.
Example
Cookie: session=abc123; theme=lightReferences
- Registry
- IANA HTTP Field Name Registry
- Guide
- MDN Cookie