diff --git a/build/lib/release.sh b/build/lib/release.sh
index 5cf716e10e..20800e6090 100644
--- a/build/lib/release.sh
+++ b/build/lib/release.sh
@@ -45,7 +45,7 @@ readonly RELEASE_DIR="${LOCAL_OUTPUT_ROOT}/release-tars"
 #   VERSION_COMMITS        (e.g. '56')
 function kube::release::parse_and_validate_ci_version() {
   # Accept things like "v1.2.3-alpha.4.56+abcdef12345678" or "v1.2.3-beta.4"
-  local -r version_regex="^v(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)-(beta|alpha|rc)\\.(0|[1-9][0-9]*)(\\.(0|[1-9][0-9]*)\\+[0-9a-f]{7,40})?$"
+  local -r 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-f]{7,40})?$"
   local -r version="${1-}"
   [[ "${version}" =~ ${version_regex} ]] || {
     kube::log::error "Invalid ci version: '${version}', must match regex ${version_regex}"
diff --git a/cluster/common.sh b/cluster/common.sh
index 7cf354be8b..c535abf357 100755
--- a/cluster/common.sh
+++ b/cluster/common.sh
@@ -30,15 +30,15 @@ source "${KUBE_ROOT}/cluster/lib/logging.sh"
 #
 # NOTE This must match the version_regex in build/common.sh
 # kube::release::parse_and_validate_release_version()
-KUBE_RELEASE_VERSION_REGEX="^v(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)(-(beta|alpha|rc)\\.(0|[1-9][0-9]*))?$"
-KUBE_RELEASE_VERSION_DASHED_REGEX="v(0|[1-9][0-9]*)-(0|[1-9][0-9]*)-(0|[1-9][0-9]*)(-(beta|alpha|rc)-(0|[1-9][0-9]*))?"
+KUBE_RELEASE_VERSION_REGEX="^v(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)(-([a-zA-Z0-9]+)\\.(0|[1-9][0-9]*))?$"
+KUBE_RELEASE_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]*))?"
 
 # KUBE_CI_VERSION_REGEX matches things like "v1.2.3-alpha.4.56+abcdefg" This
 #
 # NOTE This must match the version_regex in build/common.sh
 # kube::release::parse_and_validate_ci_version()
-KUBE_CI_VERSION_REGEX="^v(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)-(beta|alpha|rc)\\.(0|[1-9][0-9]*)(\\.(0|[1-9][0-9]*)\\+[-0-9a-z]*)?$"
-KUBE_CI_VERSION_DASHED_REGEX="^v(0|[1-9][0-9]*)-(0|[1-9][0-9]*)-(0|[1-9][0-9]*)-(beta|alpha|rc)-(0|[1-9][0-9]*)(-(0|[1-9][0-9]*)\\+[-0-9a-z]*)?"
+KUBE_CI_VERSION_REGEX="^v(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)-([a-zA-Z0-9]+)\\.(0|[1-9][0-9]*)(\\.(0|[1-9][0-9]*)\\+[-0-9a-z]*)?$"
+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]*)?"
 
 # Generate kubeconfig data for the created cluster.
 # Assumed vars:
diff --git a/cluster/get-kube.sh b/cluster/get-kube.sh
index 94a4f73be6..5ae6333eeb 100755
--- a/cluster/get-kube.sh
+++ b/cluster/get-kube.sh
@@ -65,8 +65,8 @@ set -o pipefail
 KUBERNETES_CI_RELEASE_URL="${KUBERNETES_CI_RELEASE_URL:-${KUBERNETES_RELEASE_URL:-https://dl.k8s.io/ci}}"
 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]*)(-(beta|alpha|rc)\\.(0|[1-9][0-9]*))?$"
-KUBE_CI_VERSION_REGEX="^v(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)-(beta|alpha|rc)\\.(0|[1-9][0-9]*)(\\.(0|[1-9][0-9]*)\\+[-0-9a-z]*)?$"
+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]*))?$"
+KUBE_CI_VERSION_REGEX="^v(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)-([a-zA-Z0-9]+)\\.(0|[1-9][0-9]*)(\\.(0|[1-9][0-9]*)\\+[-0-9a-z]*)?$"
 
 # Sets KUBE_VERSION variable if an explicit version number was provided (e.g. "v1.0.6",
 # "v1.2.0-alpha.1.881+376438b69c7612") or resolves the "published" version