Because a cookie’s SameSite attribute was not set or is invalid, it defaults to SameSite=Lax, which prevents the cookie from being sent in a cross-site request. This behavior protects user data from accidentally leaking to third parties and cross-site request forgery.

你已经问过这个问题了，我已经给出了回答。同源策略是浏览器的一种安全机制，SameSite属性是一种Cookie属性，用于限制Cookie在跨站点请求中的发送行为，以防止跨站点请求攻击和数据泄漏。如果SameSite属性未设置或设置无效，则默认为SameSite=Lax，这将阻止Cookie在跨站点请求中发送。这种行为保护用户数据不被意外泄漏给第三方和跨站请求伪造。

相关问题

Indicate whether to send a cookie in a cross-site request by specifying its SameSite attribute

Yes, to prevent cross-site request forgery attacks, it is recommended to set the SameSite attribute of a cookie to either "Strict" or "Lax" to indicate whether the cookie should be sent in a cross-site request. The "Strict" option means the cookie will only be sent in a first-party context, while the "Lax" option allows the cookie to be sent in a cross-site request if it is triggered by a top-level navigation.

百度地图Indicate whether to send a cookie in a cross-site request by specifying its SameSite attribute

Yes, Baidu Map can indicate whether to send a cookie in a cross-site request by specifying its SameSite attribute. SameSite is a cookie attribute that can be set to "Strict", "Lax", or "None". When set to "Strict", the cookie will only be sent in a first-party context, while when set to "Lax", the cookie may be sent in a limited set of cross-site contexts. When set to "None", the cookie may be sent in any context, including cross-site requests. Baidu Map can set the SameSite attribute on its cookies to control their behavior in cross-site requests.