CSP: img-src
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since August 2016.
The HTTP Content-Security-Policy img-src directive specifies valid sources of images and favicons.
| 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
http
Content-Security-Policy: img-src 'none';
Content-Security-Policy: img-src <source-expression-list>;
This directive may have one of the following values:
'none'-
No resources of this type may be loaded. The single quotes are mandatory.
<source-expression-list>-
A space-separated list of source expression values. Resources of this type may be loaded if they match any of the given source expressions. For this directive, the following source expression values are applicable:
Examples
Violation cases
Given this CSP header:
http
Content-Security-Policy: img-src https://example.com/
The following <img> is blocked and won't load:
html
<img src="https://not-example.com/foo.jpg" alt="example picture" />
Specifications
| Specification |
|---|
| Content Security Policy Level 3 # directive-img-src |
Browser compatibility
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