An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. For example a constraint that excludes the subdomain test.example.com does not prevent a leaf certificate from claiming the SAN *.example.com.
| Software | From | Fixed in |
|---|---|---|
| golang / go | - | 1.24.11 |
| golang / go | 1.25 | 1.25.5 |