Exposure of Sensitive Information to an Unauthorized Actor
etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.4.26 and 3.5.9, the LeaseTimeToLive API allows access to key names (not value) associated to a lease when
Keys parameter is true, even a user does not have read permission to the keys. The impact is limited to a cluster which enables auth (RBAC). Versions 3.4.26 and 3.5.9 fix this issue. There are no known workarounds.
All versions before 3.4.26, all versions starting from 3.5.0 before 3.5.9
Upgrade to versions 3.4.26, 3.5.9 or above.