FKIE_CVE-2026-102600

Vulnerability from fkie_nvd - Published: 2026-09-29 16:17 - Updated: 2026-09-30 19:38
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Socket.IO enables bidirectional and low-latency communication for every platform. Prior to 0.1.1, @socket.io/cluster-engine uses inherited object properties when looking up attacker-controlled session IDs in clustered deployments. Special property names such as __proto__ or constructor can resolve through the object prototype chain instead of identifying an actual connected client, causing the Node.js process to crash and resulting in denial of service. Applications that do not use @socket.io/cluster-engine are not affected. This issue is fixed in version 0.1.1.
References
security-advisories@github.comhttps://github.com/socketio/socket.io/commit/830e3642ebb8dc3784eb749b0a004fe2b932b429
security-advisories@github.comhttps://github.com/socketio/socket.io/releases/tag/@socket.io/cluster-engine@0.1.1
security-advisories@github.comhttps://github.com/socketio/socket.io/security/advisories/GHSA-wfpm-5gcm-94cg
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "socket.io",
          "vendor": "socketio",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.1.1"
            }
          ]
        },
        {
          "product": "cluster-engine",
          "vendor": "@socket.io",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.1.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Socket.IO enables bidirectional and low-latency communication for every platform. Prior to 0.1.1, @socket.io/cluster-engine uses inherited object properties when looking up attacker-controlled session IDs in clustered deployments. Special property names such as __proto__ or constructor can resolve through the object prototype chain instead of identifying an actual connected client, causing the Node.js process to crash and resulting in denial of service. Applications that do not use @socket.io/cluster-engine are not affected. This issue is fixed in version 0.1.1."
    }
  ],
  "id": "CVE-2026-102600",
  "lastModified": "2026-09-30T19:38:27.293",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-102600",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-29T16:27:29.573677Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-29T16:17:06.180",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/socketio/socket.io/commit/830e3642ebb8dc3784eb749b0a004fe2b932b429"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/socketio/socket.io/releases/tag/@socket.io/cluster-engine@0.1.1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/socketio/socket.io/security/advisories/GHSA-wfpm-5gcm-94cg"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        },
        {
          "lang": "en",
          "value": "CWE-1321"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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