PT-2026-1957 · Alibaba · Fastjson

CVE-2025-70974

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Published

2026-01-09

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Updated

2026-06-27

CVSS v3.1

10

Critical

VectorAV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Name of the Vulnerable Software and Affected Versions Alibaba Fastjson versions prior to 1.2.48
Description The software contains a critical deserialization issue due to improper handling of the autoType feature, which could allow for remote code execution. The issue arises when a JSON document includes an @type key with a Java class name as its value. This can lead to calls that enable remote code execution.
Recommendations Update to version 1.2.48 or later.

Exploit

Fix

RCE

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Weakness Enumeration

CWE-829

Related Identifiers

CVE-2025-70974
GHSA-JM7W-5684-PVH8

Affected Products

Fastjson