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CVE-2026-69185

Status: Awaiting AnalysisHigh (7.5)—

Socket.IO enables bidirectional and low-latency communication for every platform. Prior to 4.2.7, 3.4.5, and 3.3.6, a specially crafted Socket.IO packet can make the server wait for a large number of binary attachments and buffer them, which can be exploited to make the server run out of memory. This vulnerability is fixed in 4.2.7, 3.4.5, and 3.3.6.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Red sin privilegios (AV:N, PR:N) explotando aplicación Socket.IO expuesta. Paquete malformado provoca consumo de memoria → DoS por agotamiento de recursos.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Socket — Socket.ioAI

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2026-69185",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-69185",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-08-03T20:31:42.760361Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "socketio",
          "product": "socket.io",
          "versions": [
            {
              "status": "affected",
              "version": "< 3.3.6"
            },
            {
              "status": "affected",
              "version": ">= 3.4.0, < 3.4.5"
            },
            {
              "status": "affected",
              "version": ">= 4.0.0, < 4.2.7"
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  "published": "2026-08-03T20:17:29.797",
  "references": [
    {
      "url": "https://github.com/socketio/socket.io/commit/7c6ef571a00656718e9e05e3b948fd1758b2a7b4",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/socketio/socket.io/commit/9c6323e5cde41bd75df3379b5fc9293664a5f240",
      "source": "security-advisories@github.com"
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    {
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      "source": "security-advisories@github.com"
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    {
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      "source": "security-advisories@github.com"
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  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
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          "value": "CWE-20"
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        {
          "lang": "en",
          "value": "CWE-754"
        }
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  "descriptions": [
    {
      "lang": "en",
      "value": "Socket.IO enables bidirectional and low-latency communication for every platform. Prior to 4.2.7, 3.4.5, and 3.3.6, a specially crafted Socket.IO packet can make the server wait for a large number of binary attachments and buffer them, which can be exploited to make the server run out of memory. This vulnerability is fixed in 4.2.7, 3.4.5, and 3.3.6."
    }
  ],
  "lastModified": "2026-09-10T20:30:11.423",
  "sourceIdentifier": "security-advisories@github.com"
}