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CVE-2025-70974

🚨 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 that...

Published
Jan 09, 2026
Last Modified
Jan 13, 2026
Views
6
Bookmarks
0

Description

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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 Scores

CVSS 3.1 10.0
10.0
CRITICAL
CVSS 2.0 10.0

References

cert.360.cn github.com github.com www.cloudsek.com www.cnvd.org.cn www.freebuf.com www.seebug.org

Additional Information

Source
cve@mitre.org
State
Awaiting analysis

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