FKIE_CVE-2026-73086

Vulnerability from fkie_nvd - Published: 2026-08-11 17:19 - Updated: 2026-08-12 15:18
Severity
7.4 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Summary
nanoid is a secure, URL-friendly, unique string ID generator for JavaScript. Prior to versions 3.3.12 and 5.1.11, the nanoid(size) function in index.js and index.cjs coerces the user-influenced size parameter to a signed 32-bit integer, allowing a value of 2147483648 to become -2147483648 and corrupt the process-wide CSPRNG poolOffset in fillPool(), which causes subsequent session tokens, CSRF tokens, API keys, and unique identifiers to become the deterministic string "uuuuuuuuuuuuuuuuuuuuu" until the process restarts. This issue is fixed in versions 3.3.12 and 5.1.11.
References
security-advisories@github.comhttps://github.com/ai/nanoid/commit/7087969281cab8ba8ae3babf1894e819068b3bb4
security-advisories@github.comhttps://github.com/ai/nanoid/commit/821dfed7b5db7f88e92f56c60eef32c8135077c3
security-advisories@github.comhttps://github.com/ai/nanoid/commit/b0036ed60dc9facd7f1191a50dfb3076500202ac
security-advisories@github.comhttps://github.com/ai/nanoid/releases/tag/3.3.12
security-advisories@github.comhttps://github.com/ai/nanoid/releases/tag/5.1.11
security-advisories@github.comhttps://github.com/ai/nanoid/security/advisories/GHSA-xwg4-73v4-xw9w
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "nanoid",
          "vendor": "ai",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.3.12"
            },
            {
              "status": "affected",
              "version": "\u003e= 4.0.0, \u003c 5.1.11"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "nanoid is a secure, URL-friendly, unique string ID generator for JavaScript. Prior to versions 3.3.12 and 5.1.11, the nanoid(size) function in index.js and index.cjs coerces the user-influenced size parameter to a signed 32-bit integer, allowing a value of 2147483648 to become -2147483648 and corrupt the process-wide CSPRNG poolOffset in fillPool(), which causes subsequent session tokens, CSRF tokens, API keys, and unique identifiers to become the deterministic string \"uuuuuuuuuuuuuuuuuuuuu\" until the process restarts. This issue is fixed in versions 3.3.12 and 5.1.11."
    }
  ],
  "id": "CVE-2026-73086",
  "lastModified": "2026-08-12T15:18:30.683",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.2,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-73086",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-12T14:26:22.656696Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-11T17:19:16.690",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/ai/nanoid/commit/7087969281cab8ba8ae3babf1894e819068b3bb4"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/ai/nanoid/commit/821dfed7b5db7f88e92f56c60eef32c8135077c3"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/ai/nanoid/commit/b0036ed60dc9facd7f1191a50dfb3076500202ac"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/ai/nanoid/releases/tag/3.3.12"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/ai/nanoid/releases/tag/5.1.11"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/ai/nanoid/security/advisories/GHSA-xwg4-73v4-xw9w"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-190"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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