CVE-2025-15646 HTML::Gumbo versions before 0.19 for Perl disclose heap memory via type confusion

HTML::Gumbo versions before 0.19 for Perl disclose heap memory via type confusion. Support for the element was added to libgumbo 0.10.0 in 2015, but the walktree function in lib/HTML/Gumbo.xs was not updated to support it. The element was treated as a text-node, where strlen over-reads the heap...