CSP for Cloudflare - CDN.js
Using Cloudflare - CDN.js with Content Security Policy
Cloudflare's Open CDN of many libraries. Note that there are many libraries on this CDN, some with CSP bypasses. Don't add this to mission critical resources.
Allow these directives in your CSP, to support Cloudflare - CDN.js in your Content Security Policy:
script-src
https://cdnjs.cloudflare.com;
style-src
cdnjs.cloudflare.com;
img-src
cdnjs.cloudflare.com;
font-src
cdnjs.cloudflare.com;
connect-src
cdnjs.cloudflare.com;
The main domains used by Cloudflare - CDN.js are:
cloudflare.com
Example Content-Security-Policy violations / reports:
Using the above CSP package, will fix these errors that you may be seeing in your console logs:
script-src
/script-src-elem
/script-src-attr
violations
Refused to load the script 'https://cdnjs.cloudflare.com' because it violates the following Content Security Policy directive: "script-src 'self' 'report-sample'". Note that 'script-src-elem' was not explicitly set, so 'script-src' is used as a fallback.
If you see inline script errors, you need to add SHA-256 hashes / nonces to your CSP with RapidSec:
Refused to execute inline script because it violates the following Content Security Policy directive: "script-src 'self' 'report-sample'". Either the 'unsafe-inline' keyword, a hash ('sha256-RFWPLDbv2BY+rCkDzsE+0fr8ylGr2R2faWMhq4lfEQc='), or a nonce ('nonce-...') is required to enable inline execution.
If you see inline eval() errors, RapidSec will generate your CSP with the specific content of the errors:
Refused to evaluate a string as JavaScript because 'unsafe-eval' is not an allowed source of script in the following Content Security Policy directive: "script-src 'self' 'report-sample'".
style-src
/style-src-elem
/style-src-attr
violations
Refused to load the stylesheet 'https://cdnjs.cloudflare.com/ajax/libs/select2/*/select2.css' because it violates the following Content Security Policy directive: "style-src 'self' 'report-sample'". Note that 'style-src-elem' was not explicitly set, so 'style-src' is used as a fallback.
If you see inline style errors, you need to add SHA-256 hashes / nonces to your CSP with RapidSec:
Refused to apply inline style because it violates the following Content Security Policy directive: "style-src 'self' 'report-sample'". Either the 'unsafe-inline' keyword, a hash ('sha256-RFWPLDbv2BY+rCkDzsE+0fr8ylGr2R2faWMhq4lfEQc='), or a nonce ('nonce-...') is required to enable inline execution.
font-src
violations
Refused to load the font 'https://cdnjs.cloudflare.com/ajax/libs/font-awesome/*/fonts/fontawesome-webfont.woff' because it violates the following Content Security Policy directive: "font-src 'self'"
img-src
violations
Refused to load the image 'cloudflare.com' because it violates the following Content Security Policy directive: "img-src 'self'".
frame-src
violations
[Report Only] Refused to frame 'cloudflare.com' because it violates the following Content Security Policy directive: "frame-src 'self'".
form-action
violations
[Report Only] Refused to send form data to 'cloudflare.com' because it violates the following Content Security Policy directive: "form-action 'self'".
connect-src
violations
[Report Only] Refused to connect to 'cloudflare.com' because it violates the following Content Security Policy directive: "connect-src 'self'"