diff --git a/.changelog/20812.txt b/.changelog/20812.txt
new file mode 100644
index 0000000000..6e4fb371b8
--- /dev/null
+++ b/.changelog/20812.txt
@@ -0,0 +1,14 @@
+```release-note:security
+Upgrade to use Go `1.21.8`. This resolves CVEs
+[CVE-2024-24783](https://nvd.nist.gov/vuln/detail/CVE-2024-24783) (`crypto/x509`).
+[CVE-2023-45290](https://nvd.nist.gov/vuln/detail/CVE-2023-45290) (`net/http`).
+[CVE-2023-45289](https://nvd.nist.gov/vuln/detail/CVE-2023-45289) (`net/http`, `net/http/cookiejar`).
+[CVE-2024-24785](https://nvd.nist.gov/vuln/detail/CVE-2024-24785) (`html/template`).
+[CVE-2024-24784](https://nvd.nist.gov/vuln/detail/CVE-2024-24784) (`net/mail`).
+```
+
+```release-note:security
+Update the Consul Build Go base image to `alpine3.19`. This resolves CVEs
+[CVE-2023-52425](https://nvd.nist.gov/vuln/detail/CVE-2023-52425)
+[CVE-2023-52426⁠](https://nvd.nist.gov/vuln/detail/CVE-2023-52426)
+```
diff --git a/.go-version b/.go-version
index 8819d012ce..428abfd24f 100644
--- a/.go-version
+++ b/.go-version
@@ -1 +1 @@
-1.21.7
+1.21.8
diff --git a/build-support/docker/Build-Go.dockerfile b/build-support/docker/Build-Go.dockerfile
index 056508da67..044f7439fc 100644
--- a/build-support/docker/Build-Go.dockerfile
+++ b/build-support/docker/Build-Go.dockerfile
@@ -2,6 +2,6 @@
 # SPDX-License-Identifier: BUSL-1.1
 
 ARG GOLANG_VERSION
-FROM golang:${GOLANG_VERSION}
+FROM golang:${GOLANG_VERSION}-alpine3.19
 
 WORKDIR /consul