Affecting github.com/etcd-io/etcd/auth package, versions >=3.2.0 <3.2.26 || >=3.3.0 <3.3.11
github.com/etcd-io/etcd/auth is a None
Affected versions of this package are vulnerable to Improper Authentication. If an etcd client server TLS certificate contains a Common Name (CN) which matches a valid RBAC username, a remote attacker may authenticate as that user with any valid (trusted) client certificate in a REST API request to the gRPC-gateway.
Note: This is possible only when role-based access control (RBAC) is used and client-cert-auth is enabled.
github.com/etcd-io/etcd/auth to version 3.2.26, 3.3.11 or higher.