What does the HTTP response header for Set-Cookie mean?

What does the HTTP response header for Set-Cookie mean?

The Set-Cookie HTTP response header is used to send a cookie from the server to the user agent, so the user agent can send it back to the server later. To send multiple cookies, multiple Set-Cookie Get the latest and greatest from MDN delivered straight to your inbox. The newsletter is offered in English only at the moment.

What happens if a cookie is not set to HttpOnly?

If a browser does not support HttpOnly and a website attempts to set an HttpOnly cookie, the HttpOnly flag will be ignored by the browser, thus creating a traditional, script accessible cookie. As a result, the cookie (typically your session cookie) becomes vulnerable to theft of modification by malicious script.

Which is the default cookie for SameSite not specified?

SameSite=Lax is the new default if SameSite is not specified. Previously the default was that cookies were sent for all requests. Cookies with SameSite=None must now also specify the Secure attribute (they require a secure context).

Can a cookie be set with the Secure attribute?

A cookie with the Secure attribute is sent to the server only with an encrypted request over the HTTPS protocol, never with unsecured HTTP (except on localhost), and therefore can’t easily be accessed by a man-in-the-middle attacker. Insecure sites (with http: in the URL) can’t set cookies with the Secure attribute.

Is the Set Cookie header forbidden in JavaScript?

Browsers block frontend JavaScript code from accessing the Set Cookie header, as required by the Fetch spec, which defines Set-Cookie as a forbidden response-header name that must be filtered out from any response exposed to frontend code.

Is the Set Cookie header field obsolete in RFC 2965?

Although cookies have many historical infelicities that degrade their security and privacy, the Cookie and Set-Cookie header fields are widely used on the Internet. This document obsoletes RFC 2965 .

How are cookies used in the HTTP management mechanism?

HTTP State Management Mechanism Abstract This document defines the HTTP Cookie and Set-Cookie header fields. These header fields can be used by HTTP servers to store state (called cookies) at HTTP user agents, letting the servers maintain a stateful session over the mostly stateless HTTP protocol.