Fix #2326
diff --git a/release-notes/VERSION-2.x b/release-notes/VERSION-2.x
index 024d8f2..ce86e7c 100644
--- a/release-notes/VERSION-2.x
+++ b/release-notes/VERSION-2.x
@@ -20,6 +20,7 @@
(reported by Cyril M)
#2324: `StringCollectionDeserializer` fails with custom collection
(reported byb Daniil B)
+#2326: Block one more gadget type (CVE-2019-12086)
- Prevent String coercion of `null` in `WritableObjectId` when calling `JsonGenerator.writeObjectId()`,
mostly relevant for formats like YAML that have native Object Ids
diff --git a/src/main/java/com/fasterxml/jackson/databind/jsontype/impl/SubTypeValidator.java b/src/main/java/com/fasterxml/jackson/databind/jsontype/impl/SubTypeValidator.java
index 30adb94..a17cdf5 100644
--- a/src/main/java/com/fasterxml/jackson/databind/jsontype/impl/SubTypeValidator.java
+++ b/src/main/java/com/fasterxml/jackson/databind/jsontype/impl/SubTypeValidator.java
@@ -80,6 +80,9 @@
s.add("org.apache.openjpa.ee.JNDIManagedRuntime");
s.add("org.apache.axis2.transport.jms.JMSOutTransportInfo");
+ // [databind#2326] (2.9.9): one more 3rd party gadget
+ s.add("com.mysql.cj.jdbc.admin.MiniAdmin");
+
DEFAULT_NO_DESER_CLASS_NAMES = Collections.unmodifiableSet(s);
}