'SameSite' cookie attribute

Security

Same-site cookies (née "First-Party-Only" (née "First-Party")) allow servers to mitigate the risk of CSRF and information leakage attacks by asserting that a particular cookie should only be sent with requests initiated from the same registrable domain.

Specification

Editor's draft

Status in Chromium

Blink


Enabled by default (tracking bug) in:

  • Chrome for desktop release 51
  • Chrome for Android release 51
  • Android WebView release 51
  • Opera release 39
  • Opera for Android release 39

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.

  • Shipped
  • No public signals
  • No public signals
  • Positive

Owner

Last updated on 2018-06-26