Date::Manip versions through 7.00 for Perl return corrupted dates via non-ASCII decimal digits that pass the numeric range tests in check. The parse regexes capture year, month and day with the \d shorthand, which on a character string matches the whole Unicode decimal digit property \p{Nd} and not just [0-9]. Date::Manip::Base::check then validates the captured fields with numeric comparisons alone ($y 9999, $m 12, $d $days), and _parse_check stores the numified fields ($y+0). Perl truncates a string at the first character that is not an ASCII digit, so a field whose leading characters are ASCII digits numifies to an in-range prefix and satisfies every test: a year field of three ASCII digits followed by U+0664 ARABIC-INDIC DIGIT FOUR numifies to 202, giving the year 0202, and one…