cve-2026-47864 - MEDIUM - Unsafe Java deserialization in SerializingHttpMessageConverter — remote code execution

SerializingHttpMessageConverter deserializes the body of incoming HTTP requests with a raw java.io.ObjectInputStream and no class filtering. Any request with Content-Type application/x-java-serialized-object whose body resolves to a Serializable type is read directly via readObject() . If an application using this converter on an inbound HTTP endpoint has any known Java deserialization "gadget" on its classpath, a remote, unauthenticated attacker can achieve arbitrary code execution. This is a classic unsafe Java deserialization flaw (CWE-502).

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