[Webkit-unassigned] [Bug 223174] New: Limit XML declaration scan in text/html to the first 1024 bytes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=223174

            Bug ID: 223174
           Summary: Limit XML declaration scan in text/html to the first
                    1024 bytes
           Product: WebKit
           Version: Safari 14
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Page Loading
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: hsivonen at hsivonen.fi
                CC: beidson at apple.com

Steps to reproduce:

1. Load https://hsivonen.com/test/moz/xml-decl/kilobyte-plus-one-after.htm

Expected results:

Expected the character after "Test: " not to be ж. I.e. expected the XML declaration in text/html not take effect when its terminating greater-than sign is not within the first 1024 bytes.

Actual results:

The XML declaration syntax takes effect for character encoding indicating that the greater-than sign was scanned for past the first 1024 bytes.

Additional information:

Spec pull request: https://github.com/whatwg/html/pull/1752

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