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Setting a Same-Site attribute to a cookie is quite simple. It consists of adding just one instruction to the cookie. Simply adding ‘SameSite=Lax’ or ‘SameSite=Strict’ is enough!
What is same-site cookie attribute?
The SameSite attribute of the Set-Cookie HTTP response header allows you to declare if your cookie should be restricted to a first-party or same-site context. Previously the default was that cookies were sent for all requests.
The cookie-attribute command specifies the attributes to include in the DataPower generated cookie when it is returned in a Set-Cookie header. By default, the Secure and the HttpOnly attributes are included, which indicates that the cookie can be sent only when the connection is secure and the connection is over HTTPS.
Where do I put the SameSite cookie attribute?
You can add SameSite cookie attributes in the set-cookie HTTP response header to restricts browser behavior. It may prevent the browser from sending the cookie’s key=value pair based on the type of interaction that triggered the HTTP request. Send the cookie with requests crossing the website origin bounds.
Cookie “ myCookie ” has “sameSite” policy set to “lax” because it is missing a “sameSite” attribute, and “sameSite=lax” is the default value for this attribute. The warning appears because the SameSite policy for a cookie has not specified explicitly:
When do you not set SameSite attribute to LAX?
When you don’t set the SameSite attribute, the cookie is always sent. With SameSite=lax, the cookie is only sent on same-site requests or top-level navigation with a safe HTTP method.
Three values are passed into the updated SameSite attribute: Strict, Lax, or None. If not specified, cookies SameSite attribute takes the value SameSite=Lax by default. SameSite cookie attributes are as follows: Cookies are sent automatically only in a first party context and with HTTP GET requests.
Why is lax the default value for cookies?
Lax replaced None as the default value in order to ensure that users have reasonably robust defense against some classes of cross-site request forgery ( CSRF) attacks. Cookies will only be sent in a first-party context and not be sent along with requests initiated by third party websites.