CSP: font-src
The HTTP Content-Security-Policy
(CSP)
font-src
directive specifies
valid sources for fonts loaded using @font-face
.
CSP version | 1 |
---|---|
Directive type | Fetch directive |
default-src fallback |
Yes. If this directive is absent, the user agent will look for the
default-src directive.
|
Syntax
One or more sources can be allowed for the font-src
policy:
http
Content-Security-Policy: font-src <source>;
Content-Security-Policy: font-src <source> <source>;
Sources
<source>
can be any one of the values listed in CSP Source Values.
Note that this same set of values can be used in all fetch directives (and a number of other directives).
Examples
Violation cases
Given this CSP header:
http
Content-Security-Policy: font-src https://example.com/
The following font resource loading is blocked and won't load:
html
<style>
@font-face {
font-family: "MyFont";
src: url("https://not-example.com/font");
}
body {
font-family: "MyFont";
}
</style>
Specifications
Specification |
---|
Content Security Policy Level 3 # directive-font-src |
Browser compatibility
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