SameSite cookies are one of the most impactful modern security mechanisms for fixing security issues that involve cross-site requests. This mechanism allows applications to force browsers to only include cookies in requests that are issued same-site 1. This type of cookie has three modes: None, Lax, and Strict. SameSite Cookie Modes # The following SameSite cookie modes are available: None – Disables all protections and restores the old behavior of cookies. This mode is not recommended.