GHSA-JM7W-5684-PVH8

Vulnerability from github – Published: 2026-01-09 09:31 – Updated: 2026-01-09 19:33
VLAI?
Summary
FASTJSON Includes Functionality from Untrusted Control Sphere
Details

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.

Severity ?
10.0 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "com.alibaba:fastjson"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.2.48"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-70974"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-829"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-09T19:33:17Z",
    "nvd_published_at": "2026-01-09T07:16:02Z",
    "severity": "CRITICAL"
  },
  "details": "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.",
  "id": "GHSA-jm7w-5684-pvh8",
  "modified": "2026-01-09T19:33:17Z",
  "published": "2026-01-09T09:31:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-70974"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/alibaba/fastjson"
    },
    {
      "type": "WEB",
      "url": "https://github.com/alibaba/fastjson/compare/1.2.47...1.2.48"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vulhub/vulhub/tree/master/fastjson/1.2.47-rce"
    },
    {
      "type": "WEB",
      "url": "https://web.archive.org/web/20220121055754/https://cert.360.cn/warning/detail?id=7240aeab581c6dc2c9c5350756079955"
    },
    {
      "type": "WEB",
      "url": "https://www.cloudsek.com/blog/androxgh0st-continues-exploitation-operators-compromise-a-us-university-for-hosting-c2-logger"
    },
    {
      "type": "WEB",
      "url": "https://www.cnvd.org.cn/flaw/show/CNVD-2019-22238"
    },
    {
      "type": "WEB",
      "url": "https://www.freebuf.com/vuls/208339.html"
    },
    {
      "type": "WEB",
      "url": "https://www.seebug.org/vuldb/ssvid-98020"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "FASTJSON Includes Functionality from Untrusted Control Sphere "
}


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