When pip is installing and extracting a maliciously crafted wheel archive, files may be extracted outside the installation directory. The path traversal is limited to prefixes of the installation directory, thus isn't able to inject or overwrite executable files in typical situations.
26.0Exploitability
AV:NAC:LAT:PPR:LUI:AVulnerable System
VC:NVI:LVA:NSubsequent System
SC:NSI:NSA:N2.0/CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N