Spring Framework Unsafe Deserialization via Jackson JMS Converters

In an untrusted JMS environment, org.springframework.jms.support.converter.MappingJackson2MessageConverter and org.springframework.jms.support.converter.JacksonJsonMessageConverter allow arbitrary class instantiation, which can lead to unauthorized actions via gadget class deserialization. Affect...

CVE-2026-41855

A flaw was found in Spring Framework. In an untrusted Java Message Service JMS environment, the MappingJackson2MessageConverter and JacksonJsonMessageConverter components allow for arbitrary class instantiation. This vulnerability can be exploited by a remote attacker through gadget class...

CVE-2026-41855: Deserialization of Untrusted Data

In an untrusted JMS environment, org.springframework.jms.support.converter.MappingJackson2MessageConverter and org.springframework.jms.support.converter.JacksonJsonMessageConverter allow arbitrary class instantiation, which can lead to unauthorized actions via gadget class deserialization. Affect...