---
title: "CVE-2025-70974: FASTJSON Includes Functionality from Untrusted Control Sphere"
url: https://erroneo.us/security/cve/CVE-2025-70974/
description: "CVE-2025-70974 (com.alibaba:fastjson (Maven)): Fastjson before 1.2.48 mishandles autoType because, when an @type key is in a JSON document, and the value of…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-01-09
date_modified: 2026-10-05
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-70974"
kev: false
cvss: 10
epss: 0.00756
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-70974: FASTJSON Includes Functionality from Untrusted Control Sphere

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.8% , percentile 55: FIRST’s model estimates a 0.8% chance of exploitation activity in the next 30 days, higher than 55% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes com.alibaba:fastjson (Maven) < 1.2.48, fixed in 1.2.48 . Check your lockfile, including transitive dependencies.

## What it is

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.

## Affected packages

- Maven `com.alibaba:fastjson` < 1.2.48 → fixed: 1.2.48

## Affected products (CVE record)

- Alibaba Fastjson: < 1.2.48

## Severity

- mitre CVSS 3.1: 10 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`
- redhat-SADP CVSS 3.1: 10 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`
- GitHub CVSS 3.1: 10.0 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.76% probability of exploitation activity in the next 30 days; percentile 55.

## Sources

- [GitHub Advisory GHSA-jm7w-5684-pvh8](https://github.com/advisories/GHSA-jm7w-5684-pvh8)
- [CVE.org record CVE-2025-70974](https://www.cve.org/CVERecord?id=CVE-2025-70974)
- [NVD entry CVE-2025-70974](https://nvd.nist.gov/vuln/detail/CVE-2025-70974)
- [github.com](https://github.com/alibaba/fastjson/compare/1.2.47...1.2.48)
- [seebug.org](https://www.seebug.org/vuldb/ssvid-98020)
- [cnvd.org.cn](https://www.cnvd.org.cn/flaw/show/CNVD-2019-22238)
- [freebuf.com](https://www.freebuf.com/vuls/208339.html)
- [github.com](https://github.com/vulhub/vulhub/tree/master/fastjson/1.2.47-rce)
- [cloudsek.com](https://www.cloudsek.com/blog/androxgh0st-continues-exploitation-operators-compromise-a-us-university-for-hosting-c2-logger)
- [cert.360.cn](https://cert.360.cn/warning/detail?id=7240aeab581c6dc2c9c5350756079955)
- [access.redhat.com](https://access.redhat.com/security/cve/CVE-2025-70974)
- [RHBZ#2428203](https://bugzilla.redhat.com/show_bug.cgi?id=2428203)
- [security.access.redhat.com](https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-70974.json)
- [web.archive.org](https://web.archive.org/web/20220121055754/https://cert.360.cn/warning/detail?id=7240aeab581c6dc2c9c5350756079955)

---
Source page: https://erroneo.us/security/cve/CVE-2025-70974/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt