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Propagate parent policy container to local iframes (#36710)

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This follows the rules as defined in
https://w3c.github.io/webappsec-csp/#security-inherit-csp
where local iframes (about:blank and about:srcdoc) should
initially start with the CSP rules of the parent. After
that, all new CSP headers should only be set on the
policy container of the iframe.

Part of #36437

Signed-off-by: Tim van der Lippe <tvanderlippe@gmail.com>

Signed-off-by: Tim van der Lippe <tvanderlippe@gmail.com>
This commit is contained in:
Tim van der Lippe 2025-05-03 10:47:40 +02:00 • committed by GitHub
parent 4164f76769
commit 539ca27284
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11 changed files with 45 additions and 47 deletions
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7
tests/wpt/meta/content-security-policy/navigation/to-javascript-parent-initiated-parent-csp.html.ini vendored
View file

@ -1,10 +1,10 @@
[to-javascript-parent-initiated-parent-csp.html]
expected: TIMEOUT
[Should not have executed the javascript url for\n iframe.contentWindow.location.href]
expected: FAIL
expected: TIMEOUT
[Should not have executed the javascript url for\n otherTab.location.href]
expected: TIMEOUT
expected: NOTRUN
[Should not have executed the javascript url for\n area[target=iframe\].href]
expected: NOTRUN
@ -17,3 +17,6 @@
[Should not have executed the javascript url for\n a[target=iframe\].href]
expected: NOTRUN
[Should not have executed the javascript url for\n iframe.src]
expected: NOTRUN