The “ipaddress” module contained incorrect information about whether certain IPv4 and IPv6 addresses were designated as “globally reachable” or “private”. This affected the 'is_private' and 'is_global' properties of the ipaddress.IPv4Address, ipaddress.IPv4Network, ipaddress.IPv6Address, and ipaddress.IPv6Network classes, where values wouldn’t be returned in accordance with the latest information from the IANA Special-Purpose Address Registries.
CPython 3.12.4 and 3.13.0a6 contain updated information from these registries and thus have the intended behavior. Severity: Medium References - https://github.com/python/cpython/issues/113171 - https://github.com/python/cpython/pull/113179 - https://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml - https://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml
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