GitHub Advisoryadvisory · Maven

GHSA-jm7w-5684-pvh8 FASTJSON Includes Functionality from Untrusted Control Sphere

CRITICAL Published 2026-01-09 Modified 2026-10-05 Official page ↗
Aliases
CVE-2025-70974
Ecosystem
Maven
Packages
com.alibaba:fastjson
Severity
Critical
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weaknesses
CWE-829
Reviewed
2026-01-09

Affected packages

• Maven com.alibaba:fastjson: < 1.2.48 → fixed in 1.2.48

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.

Related

Alias · CVE (1)

  • 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… vulnerability

Weakness · CWE (1)

  • CWE-829 Inclusion of Functionality from Untrusted Control Sphere weakness

References