HTMLDOC before 1.9.19 has an out-of-bounds write in parseparagraph in ps-pdf.cxx because of an attempt to strip leading whitespace from a whitespace-only node. (CVE-2024-45508) HTMLDOC v1.9.18 contains a buffer overflow in parsepre function,ps-pdf.cxx:5681. (CVE-2024-46478)