diff --git a/CHANGELOG.md b/CHANGELOG.md
index 02481b1447..b6ffcea2c9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@ See the [releases page](https://github.com/github/codeql-action/releases) for th
 
 ## [UNRELEASED]
 
-No user facing changes.
+- Update default CodeQL bundle version to 2.21.2. [#2872](https://github.com/github/codeql-action/pull/2872)
 
 ## 3.28.16 - 23 Apr 2025
 
diff --git a/lib/defaults.json b/lib/defaults.json
index b72970f5f6..d816c25af8 100644
--- a/lib/defaults.json
+++ b/lib/defaults.json
@@ -1,6 +1,6 @@
 {
-    "bundleVersion": "codeql-bundle-v2.21.1",
-    "cliVersion": "2.21.1",
-    "priorBundleVersion": "codeql-bundle-v2.21.0",
-    "priorCliVersion": "2.21.0"
+    "bundleVersion": "codeql-bundle-v2.21.2",
+    "cliVersion": "2.21.2",
+    "priorBundleVersion": "codeql-bundle-v2.21.1",
+    "priorCliVersion": "2.21.1"
 }
diff --git a/src/defaults.json b/src/defaults.json
index 0e51eae987..29b3e671f8 100644
--- a/src/defaults.json
+++ b/src/defaults.json
@@ -1,6 +1,6 @@
 {
-  "bundleVersion": "codeql-bundle-v2.21.1",
-  "cliVersion": "2.21.1",
-  "priorBundleVersion": "codeql-bundle-v2.21.0",
-  "priorCliVersion": "2.21.0"
+  "bundleVersion": "codeql-bundle-v2.21.2",
+  "cliVersion": "2.21.2",
+  "priorBundleVersion": "codeql-bundle-v2.21.1",
+  "priorCliVersion": "2.21.1"
 }