diff --git a/cluster/common.sh b/cluster/common.sh
index 7fde4d2d6c7..00a4f59e777 100755
--- a/cluster/common.sh
+++ b/cluster/common.sh
@@ -41,6 +41,7 @@ export KUBE_RELEASE_VERSION_DASHED_REGEX="v(0|[1-9][0-9]*)-(0|[1-9][0-9]*)-(0|[1
 #
 # TODO: KUBE_CI_VERSION_REGEX is used in hack/get-build.sh and KUBE_CI_VERSION_DASHED_REGEX is used in cluster/gce/util.sh,
 # make sure to remove these vars when not used anymore
+#                              v1                .26               .0              -rc            .0              (  .1                +014f      )?
 export KUBE_CI_VERSION_REGEX="^v(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)-[a-zA-Z0-9]+\\.(0|[1-9][0-9]*)(\\.(0|[1-9][0-9]*)\\+[-0-9a-z]*)?$"
 export KUBE_CI_VERSION_DASHED_REGEX="^v(0|[1-9][0-9]*)-(0|[1-9][0-9]*)-(0|[1-9][0-9]*)-[a-zA-Z0-9]+-(0|[1-9][0-9]*)(-(0|[1-9][0-9]*)\\+[-0-9a-z]*)?"
 
diff --git a/cluster/get-kube.sh b/cluster/get-kube.sh
index 760503bfc4b..6a0bde87a25 100755
--- a/cluster/get-kube.sh
+++ b/cluster/get-kube.sh
@@ -72,6 +72,7 @@ KUBERNETES_CI_RELEASE_URL="${KUBERNETES_CI_RELEASE_URL:-${KUBERNETES_RELEASE_URL
 KUBERNETES_RELEASE_URL="${KUBERNETES_RELEASE_URL:-https://dl.k8s.io}"
 
 KUBE_RELEASE_VERSION_REGEX="^v(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)(-([a-zA-Z0-9]+)\\.(0|[1-9][0-9]*))?$"
+#                       v1                .26               .0              -rc            .0              (   .0                +014f     )?
 KUBE_CI_VERSION_REGEX="^v(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)-[a-zA-Z0-9]+\\.(0|[1-9][0-9]*)(\\.(0|[1-9][0-9]*)\\+[-0-9a-z]*)?$"
 
 # Sets KUBE_VERSION variable if an explicit version number was provided (e.g. "v1.0.6",