All versions of the package configobj are vulnerable to Regular Expression Denial of Service (ReDoS) via the validate function, using (.+?)((.*)).
Note: This is only exploitable in the case of a developer, putting the offending value in a server side configuration file.
Exploitability
AV:NAC:HPR:NUI:NScope
S:UImpact
C:NI:NA:L3.7/CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:LResource Management