CVE-2026-47856

Spring Integration 's JsonToObjectTransformer deserializes JSON messages by resolving the json__TypeId__ message header to a target class via ClassUtils.forName, with no type or package allow-list to constrain the resolved class. This allows an attacker with low privileges to supply an arbitrary ...

CVE-2026-47856 JsonToObjectTransformer resolves the json__TypeId__ message header to an arbitrary class without an allow-list

Spring Integration's JSON to object conversion uses the jsonTypeId header to choose the deserialization target type, and resolves that header value to a class with ClassUtils.forName and no type/package allow-list. Spring Integration 7.1.0 Spring Integration 7.0.0 - 7.0.5 Spring Integration 6.5.0...

Deserialization of Untrusted Data

Overview Affected versions of this package are vulnerable to Deserialization of Untrusted Data via the JsonToObjectTransformer. An attacker can execute arbitrary code or instantiate unexpected classes by supplying a crafted jsonTypeId message header that is mapped from an external source, such as...

cve-2026-47856 - MEDIUM - JsonToObjectTransformer resolves the json__TypeId__ message header to an arbitrary class without an allow-list

cve-2026-47856 - MEDIUM - JsonToObjectTransformer resolves the jsonTypeId message header to an arbitrary class without an allow-list...