StringEqual in TiXmlDeclaration::Parse in tinyxmlparser.cpp in TinyXML through 2.6.2 has a reachable assertion (and application exit) via a crafted XML document with a ‘\0’ located after whitespace.
lists.debian.org/debian-lts-announce/2023/12/msg00024.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4QCR5PIOBGDIDS6SYRESTMDJSEDFSCOE/
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sourceforge.net/p/tinyxml/git/ci/master/tree/tinyxmlparser.cpp
www.forescout.com/resources/sierra21-vulnerabilities