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CVE-2025-70974

10.0 · CRITICAL

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 t…

Published Jan 9, 2026CWE-829EPSS 0.76%

Overview

CVE-2025-70974 is a critical-severity vulnerability. It was published on January 9, 2026 and has a CVSS 3.1 base score of 10.0 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refcert.360.cn/warning/detail?id=7240aeab581c6dc2c9c5350756079955GitHubgithub.com/alibaba/fastjson/compare/1.2.47...1.2.48GitHubgithub.com/vulhub/vulhub/tree/master/fastjson/1.2.47-rceRefwww.cloudsek.com/blog/androxgh0st-continues-exploitation-operators-compromise-a-us-university-for-hosting-c2-loggerRefwww.cnvd.org.cn/flaw/show/CNVD-2019-22238Refwww.freebuf.com/vuls/208339.htmlRefwww.seebug.org/vuldb/ssvid-98020Refaccess.redhat.com/security/cve/CVE-2025-70974Refbugzilla.redhat.com/show_bug.cgi?id=2428203Refsecurity.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-70974.json

How CyberStrike helps

Frequently asked questions

What is CVE-2025-70974?

CVE-2025-70974 is a critical-severity vulnerability. It was published on January 9, 2026 and has a CVSS 3.1 base score of 10.0 (CRITICAL).

How severe is CVE-2025-70974?

This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-70974?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-70974?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-70974 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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