CVE-2026-73086 (GCVE-0-2026-73086)

Vulnerability from cvelistv5 – Published: 2026-08-11 16:46 – Updated: 2026-08-12 14:29
VLAI
Title
nanoid: Integer Overflow or Wraparound
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.
Severity
7.4 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 14:26 UTC
CWE
  • CWE-190 - Integer Overflow or Wraparound
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7814 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
ai nanoid Affected: < 3.3.12
Affected: >= 4.0.0, < 5.1.11
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-73086",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-12T14:26:22.656696Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-12T14:29:36.568Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "nanoid",
          "vendor": "ai",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.3.12"
            },
            {
              "status": "affected",
              "version": "\u003e= 4.0.0, \u003c 5.1.11"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "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"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-190",
              "description": "CWE-190: Integer Overflow or Wraparound",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-11T16:46:23.024Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/ai/nanoid/security/advisories/GHSA-xwg4-73v4-xw9w",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/ai/nanoid/security/advisories/GHSA-xwg4-73v4-xw9w"
        },
        {
          "name": "https://github.com/ai/nanoid/commit/7087969281cab8ba8ae3babf1894e819068b3bb4",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ai/nanoid/commit/7087969281cab8ba8ae3babf1894e819068b3bb4"
        },
        {
          "name": "https://github.com/ai/nanoid/commit/821dfed7b5db7f88e92f56c60eef32c8135077c3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ai/nanoid/commit/821dfed7b5db7f88e92f56c60eef32c8135077c3"
        },
        {
          "name": "https://github.com/ai/nanoid/commit/b0036ed60dc9facd7f1191a50dfb3076500202ac",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ai/nanoid/commit/b0036ed60dc9facd7f1191a50dfb3076500202ac"
        },
        {
          "name": "https://github.com/ai/nanoid/releases/tag/3.3.12",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ai/nanoid/releases/tag/3.3.12"
        },
        {
          "name": "https://github.com/ai/nanoid/releases/tag/5.1.11",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ai/nanoid/releases/tag/5.1.11"
        }
      ],
      "source": {
        "advisory": "GHSA-xwg4-73v4-xw9w",
        "discovery": "UNKNOWN"
      },
      "title": "nanoid: Integer Overflow or Wraparound"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-73086",
    "datePublished": "2026-08-11T16:46:23.024Z",
    "dateReserved": "2026-08-10T19:37:41.445Z",
    "dateUpdated": "2026-08-12T14:29:36.568Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-73086",
      "date": "2026-11-10",
      "epss": "0.00296",
      "percentile": "0.22491"
    },
    "nvd": {
      "cve": {
        "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."
          },
          {
            "lang": "es",
            "value": "nanoid es un generador de ID de cadena \u00fanico, seguro y compatible con URL para JavaScript. Antes de las versiones 3.3.12 y 5.1.11, la funci\u00f3n nanoid(size) en index.js e index.cjs coerciona el par\u00e1metro \u2019size\u2019, influenciado por el usuario, a un entero con signo de 32 bits, permitiendo que un valor de 2147483648 se convierta en -2147483648 y corrompa el poolOffset del CSPRNG a nivel de proceso en fillPool(), lo que provoca que los subsiguientes tokens de sesi\u00f3n, tokens CSRF, claves API e identificadores \u00fanicos se conviertan en la cadena determinista \u2019uuuuuuuuuuuuuuuuuuuuu\u2019 hasta que el proceso se reinicie. Este problema se ha solucionado en las versiones 3.3.12 y 5.1.11."
          }
        ],
        "id": "CVE-2026-73086",
        "lastModified": "2026-10-24T15:10:00.190",
        "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": "Deferred",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-190"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-11-04T23:15:41+00:00",
      "cve": "CVE-2026-73086",
      "id": "CVE-2026-73086",
      "initial_release_date": "2026-08-11T16:46:23.024000+00:00",
      "product_status:fixed": "199",
      "product_status:known_affected": "32",
      "product_status:known_not_affected": "5060",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "nanoid: nanoid: Predictable ID generation due to integer overflow",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-73086.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-15T01:24:32Z",
      "cve": "CVE-2026-73086",
      "id": "CVE-2026-73086",
      "initial_release_date": "2026-08-22T16:28:38Z",
      "product_status:known_affected": "265",
      "product_status:known_not_affected": "334",
      "product_status:recommended": "1",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-73086",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-73086.json",
      "version": "6"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-73086",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-08-12T14:26:22.656696Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-08-12T14:29:30.584Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "nanoid",
              "vendor": "ai",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c 3.3.12"
                },
                {
                  "status": "affected",
                  "version": "\u003e= 4.0.0, \u003c 5.1.11"
                }
              ]
            }
          ],
          "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."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "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"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-190",
                  "description": "CWE-190: Integer Overflow or Wraparound",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-11T16:46:23.024Z",
            "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
            "shortName": "GitHub_M"
          },
          "references": [
            {
              "name": "https://github.com/ai/nanoid/security/advisories/GHSA-xwg4-73v4-xw9w",
              "tags": [
                "x_refsource_CONFIRM"
              ],
              "url": "https://github.com/ai/nanoid/security/advisories/GHSA-xwg4-73v4-xw9w"
            },
            {
              "name": "https://github.com/ai/nanoid/commit/7087969281cab8ba8ae3babf1894e819068b3bb4",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/ai/nanoid/commit/7087969281cab8ba8ae3babf1894e819068b3bb4"
            },
            {
              "name": "https://github.com/ai/nanoid/commit/821dfed7b5db7f88e92f56c60eef32c8135077c3",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/ai/nanoid/commit/821dfed7b5db7f88e92f56c60eef32c8135077c3"
            },
            {
              "name": "https://github.com/ai/nanoid/commit/b0036ed60dc9facd7f1191a50dfb3076500202ac",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/ai/nanoid/commit/b0036ed60dc9facd7f1191a50dfb3076500202ac"
            },
            {
              "name": "https://github.com/ai/nanoid/releases/tag/3.3.12",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/ai/nanoid/releases/tag/3.3.12"
            },
            {
              "name": "https://github.com/ai/nanoid/releases/tag/5.1.11",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/ai/nanoid/releases/tag/5.1.11"
            }
          ],
          "source": {
            "advisory": "GHSA-xwg4-73v4-xw9w",
            "discovery": "UNKNOWN"
          },
          "title": "nanoid: Integer Overflow or Wraparound"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2026-73086",
        "datePublished": "2026-08-11T16:46:23.024Z",
        "dateReserved": "2026-08-10T19:37:41.445Z",
        "dateUpdated": "2026-08-12T14:29:36.568Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.