Libsixel 1
Libsixel 1.8.3 contains a heap-based buffer overflow in the sixel_encode_highcolor function in tosixel.c.
Exploitability
AV:N
AC:L
PR:N
UI:R
Scope
S:U
Impact
C:H
I:H
A:H
8.8/CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H