The HTTP Content-Security-Policy (CSP) sandbox directive enables a sandbox for the requested resource similar to the <iframe> sandbox attribute. It applies restrictions to a page's actions including preventing popups, preventing the execution of plugins and scripts, and enforcing a same-origin policy.
| CSP version | 1.1 / 2 |
|---|---|
| Directive type | Document directive |
This directive is not supported in the <meta> element or by the Content-Security-policy-Report-Only header field. | |
Content-Security-Policy: sandbox; Content-Security-Policy: sandbox <value>;
where <value> can optionally be one of the following values:
allow-downloadsAllows for downloads after the user clicks a button or link.
allow-downloads-without-user-activation Experimental
Allows for downloads to occur without a gesture from the user.
allow-formsAllows the page to submit forms. If this keyword is not used, this operation is not allowed.
allow-modalsAllows the page to open modal windows.
allow-orientation-lockAllows the page to disable the ability to lock the screen orientation.
allow-pointer-lockAllows the page to use the Pointer Lock API.
allow-popups Allows popups (like from window.open, target="_blank", showModalDialog). If this keyword is not used, that functionality will silently fail.
allow-popups-to-escape-sandboxAllows a sandboxed document to open new windows without forcing the sandboxing flags upon them. This will allow, for example, a third-party advertisement to be safely sandboxed without forcing the same restrictions upon the page the ad links to.
allow-presentationAllows embedders to have control over whether an iframe can start a presentation session.
allow-same-originAllows the content to be treated as being from its normal origin. If this keyword is not used, the embedded content is treated as being from a unique origin.
allow-scriptsAllows the page to run scripts (but not create pop-up windows). If this keyword is not used, this operation is not allowed.
allow-storage-access-by-user-activation Experimental
Lets the resource request access to the parent's storage capabilities with the Storage Access API.
Allows the page to navigate (load) content to the top-level browsing context. If this keyword is not used, this operation is not allowed.
Lets the resource navigate the top-level browsing context, but only if initiated by a user gesture.
Allows navigations toward non-fetch schemes to be handed off to external software.
Content-Security-Policy: sandbox allow-scripts;
| Specification |
|---|
| Content Security Policy Level 3 # directive-sandbox |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
sandbox |
25 |
14 |
50 |
10 |
15 |
7 |
Yes |
Yes |
50 |
No |
7 |
Yes |
Content-Security-Policysandbox attribute on <iframe> elements
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https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/sandbox