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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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3
tests/wpt/meta/content-security-policy/script-src/srcdoc-doesnt-bypass-script-src.sub.html.ini vendored
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@ -1,3 +0,0 @@
[srcdoc-doesnt-bypass-script-src.sub.html]
[Expecting logs: ["violated-directive=script-src-elem"\]]
expected: FAIL