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LibWeb: Avoid invoking Trusted Types where avoidable

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Prevents observably calling Trusted Types, which can run arbitrary JS,
cause crashes due to use of MUST and allow arbitrary JS to modify
internal elements.
This commit is contained in:
Luke Wilde 2025-10-31 12:30:47 +00:00 • committed by Tim Flynn
parent fb9406ddcd
commit 82bd3d3891
Notes: github-actions[bot] 2025-11-06 16:46:00 +00:00
83 changed files with 407 additions and 366 deletions
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18
Libraries/LibWeb/DOM/DocumentLoading.cpp
View file

@ -296,7 +296,7 @@ static WebIDL::ExceptionOr<GC::Ref<DOM::Document>> load_media_document(HTML::Nav
};
auto style_element = TRY(DOM::create_element(document, HTML::TagNames::style, Namespace::HTML));
MUST(style_element->set_text_content(R"~~~(
style_element->string_replace_all(R"~~~(
:root {
background-color: #222;
}
@ -310,29 +310,29 @@ static WebIDL::ExceptionOr<GC::Ref<DOM::Document>> load_media_document(HTML::Nav
img {
background-color: #fff;
}
)~~~"_utf16));
)~~~"_utf16);
TRY(document->head()->append_child(style_element));
auto url_string = document->url_string();
if (type.is_image()) {
auto img_element = TRY(DOM::create_element(document, HTML::TagNames::img, Namespace::HTML));
TRY(img_element->set_attribute(HTML::AttributeNames::src, url_string));
img_element->set_attribute_value(HTML::AttributeNames::src, url_string);
TRY(document->body()->append_child(img_element));
TRY(insert_title(document, url_string));
} else if (type.type() == "video"sv) {
auto video_element = TRY(DOM::create_element(document, HTML::TagNames::video, Namespace::HTML));
TRY(video_element->set_attribute(HTML::AttributeNames::src, url_string));
TRY(video_element->set_attribute(HTML::AttributeNames::autoplay, String {}));
TRY(video_element->set_attribute(HTML::AttributeNames::controls, String {}));
video_element->set_attribute_value(HTML::AttributeNames::src, url_string);
video_element->set_attribute_value(HTML::AttributeNames::autoplay, String {});
video_element->set_attribute_value(HTML::AttributeNames::controls, String {});
TRY(document->body()->append_child(video_element));
TRY(insert_title(document, url_string));
} else if (type.type() == "audio"sv) {
auto audio_element = TRY(DOM::create_element(document, HTML::TagNames::audio, Namespace::HTML));
TRY(audio_element->set_attribute(HTML::AttributeNames::src, url_string));
TRY(audio_element->set_attribute(HTML::AttributeNames::autoplay, String {}));
TRY(audio_element->set_attribute(HTML::AttributeNames::controls, String {}));
audio_element->set_attribute_value(HTML::AttributeNames::src, url_string);
audio_element->set_attribute_value(HTML::AttributeNames::autoplay, String {});
audio_element->set_attribute_value(HTML::AttributeNames::controls, String {});
TRY(document->body()->append_child(audio_element));
TRY(insert_title(document, url_string));