CVE-2025-70974

Description

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.

PUBLISHED Reserved 2026-01-09 | Published 2026-01-09 | Updated 2026-01-09 | Assigner mitre

Problem types

CWE-829 Inclusion of Functionality from Untrusted Control Sphere

Product status

References

github.com/alibaba/fastjson/compare/1.2.47...1.2.48

www.seebug.org/vuldb/ssvid-98020

www.cnvd.org.cn/flaw/show/CNVD-2019-22238

www.freebuf.com/vuls/208339.html

github.com/vulhub/vulhub/tree/master/fastjson/1.2.47-rce

www.cloudsek.com/...se-a-us-university-for-hosting-c2-logger

cert.360.cn/...ng/detail?id=7240aeab581c6dc2c9c5350756079955

cve.org (CVE-2025-70974)

nvd.nist.gov (CVE-2025-70974)

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