W3C

CSP cover page

2021-06-29 Working Draft

Content Security Policy Level 3

This document defines a mechanism by which web developers can control the resources which a particular page can fetch or execute, as well as a number of security-relevant policy decisions.

2016-12-15 Recommendation

Content Security Policy Level 2

This document defines a policy language used to declare a set of content restrictions for a web resource, and a mechanism for transmitting the policy from a server to a client where the policy is enforced.

Related Retired Specifications