CVE-2025-70974: Alibaba Fastjson

Critical severity, CVSS 10.0. EPSS: 0.8% chance of exploitation in the next 30 days.

Fastjson before 1.2.48 mishandles autoType because, when an @type key is in a JSON document, and the value of that key is the name of a Java class, there may be calls to certain public methods of that class. Depending on the behavior of those methods, there may be JNDI injection with an attacker-supplied payload located elsewhere in that JSON document. This was exploited in the wild in 2023 through 2025. NOTE: this issue exists because of an incomplete fix for CVE-2017-18349. Also, a later bypass is covered by CVE-2022-25845.

Affected products

• Alibaba Fastjson: before 1.2.48 (fixed in 1.2.48)
• Red Hat Openshift Service Mesh 2
• Red Hat Red Hat Build Of Apache Camel For Spring Boot 4
• Red Hat Red Hat Build Of Debezium 2
• Red Hat Red Hat Build Of Debezium 3
• Red Hat Red Hat Fuse 7
• Red Hat Red Hat JBoss Enterprise Application Platform 8
• Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack

Published 2026-01-09. Last modified 2026-07-15.