Unrated

UBUNTU-CVE-2026-73086

Type: advisorySource: OSV1 source record

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.

Announced 11 Aug 2026Group revision 1

Original source ↗

UBUNTU-CVE-2026-73086

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:UBUNTU-CVE-2026-73086

node-mocha

Source reference: /affected/0/package/name

Affected versions: 1.20.1-1
Source reference: /affected/0/versions
1.20.1-2
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

node-mocha

Source reference: /affected/1/package/name

Affected versions: 1.20.1-7
Source reference: /affected/1/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

node-mocha

Source reference: /affected/2/package/name

Affected versions: 4.1.0+ds3-5
Source reference: /affected/2/versions
7.0.1+ds1-2
Source reference: /affected/2/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

node-postcss

Source reference: /affected/3/package/name

Affected versions: 6.0.23-1
Source reference: /affected/3/versions
6.0.23-3
Source reference: /affected/3/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

node-postcss

Source reference: /affected/4/package/name

Affected versions: 8.2.1+~cs5.3.23-8
Source reference: /affected/4/versions
8.4.5+~cs7.1.51-2
Source reference: /affected/4/versions
8.4.6+~cs7.3.21-1
Source reference: /affected/4/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

node-postcss

Source reference: /affected/5/package/name

Affected versions: 8.4.20+~cs8.0.23-1
Source reference: /affected/5/versions
8.4.31+~cs8.0.26-1
Source reference: /affected/5/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

node-postcss

Source reference: /affected/6/package/name

Affected versions: 8.5.6+~cs9.3.28-1
Source reference: /affected/6/versions
8.5.8+~cs9.3.30-1
Source reference: /affected/6/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "node-mocha",
      "purl": "pkg:deb/ubuntu/node-mocha?arch=source&distro=xenial",
      "ecosystem": "Ubuntu:16.04:LTS"
    },
    "versions": [
      "1.20.1-1",
      "1.20.1-2"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73086.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "libjs-mocha",
          "binary_version": "1.20.1-2"
        },
        {
          "binary_name": "mocha",
          "binary_version": "1.20.1-2"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "node-mocha",
      "purl": "pkg:deb/ubuntu/node-mocha?arch=source&distro=bionic",
      "ecosystem": "Ubuntu:18.04:LTS"
    },
    "versions": [
      "1.20.1-7"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73086.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "libjs-mocha",
          "binary_version": "1.20.1-7"
        },
        {
          "binary_name": "mocha",
          "binary_version": "1.20.1-7"
        }
      ]
    }
  },
  {
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      {
        "type": "ECOSYSTEM",
        "events": [
          {
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    ],
    "package": {
      "name": "node-mocha",
      "purl": "pkg:deb/ubuntu/node-mocha?arch=source&distro=focal",
      "ecosystem": "Ubuntu:20.04:LTS"
    },
    "versions": [
      "4.1.0+ds3-5",
      "7.0.1+ds1-2"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73086.json"
    },
    "ecosystem_specific": {
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          "binary_name": "mocha",
          "binary_version": "7.0.1+ds1-2"
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  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "node-postcss",
      "purl": "pkg:deb/ubuntu/node-postcss?arch=source&distro=focal",
      "ecosystem": "Ubuntu:20.04:LTS"
    },
    "versions": [
      "6.0.23-1",
      "6.0.23-3"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73086.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "node-postcss",
          "binary_version": "6.0.23-3"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "node-postcss",
      "purl": "pkg:deb/ubuntu/node-postcss?arch=source&distro=jammy",
      "ecosystem": "Ubuntu:22.04:LTS"
    },
    "versions": [
      "8.2.1+~cs5.3.23-8",
      "8.4.5+~cs7.1.51-2",
      "8.4.6+~cs7.3.21-1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73086.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "node-postcss",
          "binary_version": "8.4.6+~cs7.3.21-1"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "node-postcss",
      "purl": "pkg:deb/ubuntu/node-postcss?arch=source&distro=noble",
      "ecosystem": "Ubuntu:24.04:LTS"
    },
    "versions": [
      "8.4.20+~cs8.0.23-1",
      "8.4.31+~cs8.0.26-1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73086.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "node-postcss",
          "binary_version": "8.4.31+~cs8.0.26-1"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "node-postcss",
      "purl": "pkg:deb/ubuntu/node-postcss?arch=source&distro=resolute",
      "ecosystem": "Ubuntu:26.04:LTS"
    },
    "versions": [
      "8.5.6+~cs9.3.28-1",
      "8.5.8+~cs9.3.30-1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73086.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "node-postcss",
          "binary_version": "8.5.8+~cs9.3.30-1"
        }
      ]
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #51960 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 14:36:43 GMT
Publisher date: Tue, 11 Aug 2026 17:19:00 GMT

Read the original announcement

Revision history

25 Oct 2026UBUNTU-CVE-2026-73086 · Revision 1Source updated