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Refuse file: URLs in fetch and XMLHttpRequest from documents that are not file: - #56
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FlorianRappl merged 2 commits intoNov 4, 2026
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…themselves A page loaded over http(s), data: or about: could read local files with fetch or XMLHttpRequest, directly or through a redirect to file:. Like browsers, only a file: document may request file: URLs from script now. fetch rejects, XHR fires error without sending a request.
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FlorianRappl
approved these changes
Nov 4, 2026
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Code for #53.
A page loaded over
http(s),data:orabout:could read local files withfetchorXMLHttpRequest, either directly or through a redirect tofile:. On Windows,file://host/share/xalso makes the process connect to that host's file share.file:document may requestfile:URLs from script now (FileUrlPolicy).fetchrejects ("Failed to fetch"), and XHR fireserrorwithout sending a request.file:is dropped in both.file:documents, other schemes, andOpenAsyncfrom C#.Tests: a direct request, a redirect, a
file:page that still works, and XHR.🤖 Generated with Claude Code