Deserialization of Untrusted Data

Property	Value
Language	java
Severity
CWE	CWE-502: Deserialization of Untrusted Data
OWASP	A8:2017 Insecure Deserialization
Confidence Level	Medium
Impact Level	High
Likelihood Level	Low

Description

Enabling default typing in Jackson (e.g., with enableDefaultTyping() or certain @JsonTypeInfo annotations) exposes your application to unsafe deserialization. If user-controlled JSON is processed this way, attackers can craft payloads that instantiate unexpected classes during deserialization.

Impact

An attacker could exploit this to achieve remote code execution, letting them run arbitrary code on your server. This can lead to full system compromise, data theft, service disruption, or further attacks against your infrastructure.