pygments is vulnerable to denial of service (DoS). The vulnerability exists through an infinite loop in the SML
lexer through the lookahead-only regular expression pattern used.
bugzilla.redhat.com/show_bug.cgi?id=1922136
github.com/pygments/pygments/commit/f91804ff4772e3ab41f46e28d370f57898700333
lists.debian.org/debian-lts-announce/2021/05/msg00003.html
lists.debian.org/debian-lts-announce/2021/05/msg00006.html
www.debian.org/security/2021/dsa-4889
www.oracle.com/security-alerts/cpuoct2021.html