CVE-2026-16723

Full vulnerability record from the local CVENow database.

Description

A remote code execution (RCE) vulnerability exists in fastjson 1.2.68 through 1.2.83. This vulnerability is exploitable under fastjson's stock default configuration — no AutoType enablement required, no classpath gadget required.

Severity

CRITICAL

CVSS score

9.0 (v3.1)

Vulnerability status

Deferred

Source identifier

[email protected]

Published

2026-07-23 09:16:26.700000

Last modified

2026-10-24 13:10:00.147000

View original CVE JSON

{
  "id": "CVE-2026-16723",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-23T09:16:26.700",
  "lastModified": "2026-10-24T13:10:00.147",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A remote code execution (RCE) vulnerability exists in fastjson 1.2.68 through 1.2.83. This vulnerability is exploitable under fastjson's stock default configuration — no AutoType enablement required, no classpath gadget required."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de ejecución remota de código (RCE) existe en fastjson desde 1.2.68 hasta 1.2.83. Esta vulnerabilidad es explotable bajo la configuración predeterminada de fábrica de fastjson - no se requiere la habilitación de AutoType, no se requiere un gadget de classpath."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Alibaba",
          "product": "Fastjson",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "1.2.68",
              "lessThanOrEqual": "1.2.83",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
          "baseScore": 9.0,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 6.0
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-23T13:54:05.935678Z",
          "id": "CVE-2026-16723",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        },
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/alibaba/fastjson2/wiki/Security-Advisory:-Remote-Code-Execution-in-fastjson-1.2.68%E2%80%931.2.83",
      "source": "[email protected]"
    }
  ]
}