Critical severity · published Jan 9, 2026
CVE-2025-70974
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…
10.0
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FA
Fastjson · Alibaba
before 1.2.48 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-70974
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-70974
cert.360.cn
https://cert.360.cn/warning/detail?id=7240aeab581c6dc2c9c5350756079955
github.com
https://github.com/alibaba/fastjson/compare/1.2.47...1.2.48
github.com
https://github.com/vulhub/vulhub/tree/master/fastjson/1.2.47-rce
www.cloudsek.com
https://www.cloudsek.com/blog/androxgh0st-continues-exploitation-operators-compromise-a-us-university-for-hosting-c2-logger
www.cnvd.org.cn
https://www.cnvd.org.cn/flaw/show/CNVD-2019-22238
www.freebuf.com
https://www.freebuf.com/vuls/208339.html
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