Unexpected behavior from Is methods for IPv4-mapped IPv6 addresses in net/netip
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.8epss 2.0%
exploitation probability
2.0%top 22% of all CVEs
observed exploitation
nono source reports it
The various Is methods (IsPrivate, IsLoopback, etc) did not work as expected for IPv4-mapped IPv6 addresses, returning false for addresses which would return true in their traditional IPv4 forms.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Go standard library · net/netip