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CVE-2025-70974 — Vulnerability in com.alibaba:fastjson — CVE Details

CRITICAL

FASTJSON Includes Functionality from Untrusted Control Sphere

Published January 9, 2026Updated October 5, 2026Source: osv

Summary

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.

Advisory Timeline

  • First published January 9, 2026 (276 days ago).
  • Last revised October 5, 2026 — 269 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Maven
Update com.alibaba:fastjson to 1.2.48 or later
<!-- Update pom.xml dependency version to 1.2.48 for com.alibaba:fastjson -->

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: maven (1).

PackageEcosystemAffectedFixed In
com.alibaba:fastjson
maven
1.1.15, 1.1.16, 1.1.17, 1.1.18 (+176 more)1.2.48

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 10.0 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2025-70974?
FASTJSON Includes Functionality from Untrusted Control Sphere This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 10.0/10).
How do I check if my project is affected by CVE-2025-70974?
CVE-2025-70974 affects com.alibaba:fastjson. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2025-70974 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
10.0

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-jm7w-5684-pvh8

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