The rencode package through 1.0.6 for Python allows an infinite loop in typecode decoding (such as via ;\x2f\x7f), enabling a remote attack that consumes CPU and memory.
https://security.netapp.com/advisory/ntap-20211008-0001/
https://seclists.org/fulldisclosure/2021/Sep/16
https://pypi.org/project/rencode/#history
https://github.com/aresch/rencode/pull/29
https://github.com/aresch/rencode/commit/572ff74586d9b1daab904c6f7f7009ce0143bb75