The urllib.parse.urlsplit() and urlparse() functions improperly validated bracketed hosts (`[]`), allowing hosts that weren't IPv6 or IPvFuture. This behavior was not conformant to RFC 3986 and potentially enabled SSRF if a URL is processed by more than one URL parser.
https://mail.python.org/archives/list/[email protected]/thread/XPWB6XVZ5G5KGEI63M4AWLIEUF5BPH4T/
https://github.com/python/cpython/pull/103849
https://github.com/python/cpython/issues/103848
https://github.com/python/cpython/commit/b2171a2fd41416cf68afd67460578631d755a550
https://github.com/python/cpython/commit/29f348e232e82938ba2165843c448c2b291504c5
Published: 2024-11-12
Updated: 2024-11-13
Base Score: 6.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N
Severity: Medium
Base Score: 9.1
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Severity: Critical
Base Score: 6.3
Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N
Severity: Medium