What’s Vulnerable › Vulnerabilities

CVE-2025-70974

• Severity: critical (CVSS 10.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-09 · updated 2026-07-15
• Weakness: CWE-829

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.

Affected products

• Alibaba Fastjson: before 1.2.48 — fixed in 1.2.48

How to fix

Upgrade to a fixed version: Alibaba Fastjson 1.2.48. Check the vendor advisory for mitigations.

References

• https://cert.360.cn/warning/detail?id=7240aeab581c6dc2c9c5350756079955
• https://github.com/alibaba/fastjson/compare/1.2.47...1.2.48
• https://github.com/vulhub/vulhub/tree/master/fastjson/1.2.47-rce
• https://www.cloudsek.com/blog/androxgh0st-continues-exploitation-operators-compromise-a-us-university-for-hosting-c2-logger
• https://www.cnvd.org.cn/flaw/show/CNVD-2019-22238
• https://www.freebuf.com/vuls/208339.html
• https://www.seebug.org/vuldb/ssvid-98020
• https://access.redhat.com/security/cve/CVE-2025-70974
• https://bugzilla.redhat.com/show_bug.cgi?id=2428203
• https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-70974.json

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