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Critical

nano-id is unable to generate the correct character set

Type: advisorySources: OSV

nano-id is a unique string ID generator for Rust. Affected versions of the nano-id crate incorrectly generated IDs using a reduced character set in the `nano_id::base62` and `nano_id::base58` functions. Specifically, the `base62` function used a character set of 32 symbols instead of the intended 62 symbols, and the `base58` function used a character set of 16 symbols instead of the intended 58 symbols. Additionally, the `nano_id::gen` macro is also affected when a custom character set that is not a power of 2 in size is specified. It should be noted that `nano_id::base64` is not affected by this vulnerability. This can result in a significant reduction in entropy, making the generated IDs predictable and vulnerable to brute-force attacks when the IDs are used in security-sensitive contexts such as session tokens or unique identifiers. The vulnerability is fixed in 0.4.0.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2024-36400
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 07:08 UTC · Revision 1

Source evidence

nano-id is unable to generate the correct character set

core-osv · Original source

Published 4 Jun 2024, 14:11 UTC

nano-id is a unique string ID generator for Rust. Affected versions of the nano-id crate incorrectly generated IDs using a reduced character set in the `nano_id::base62` and `nano_id::base58` functions. Specifically, the `base62` function used a character set of 32 symbols instead of the intended 62 symbols, and the `base58` function used a character set of 16 symbols instead of the intended 58 symbols. Additionally, the `nano_id::gen` macro is also affected when a custom character set that is not a power of 2 in size is specified. It should be noted that `nano_id::base64` is not affected by this vulnerability. This can result in a significant reduction in entropy, making the generated IDs predictable and vulnerable to brute-force attacks when the IDs are used in security-sensitive contexts such as session tokens or unique identifiers. The vulnerability is fixed in 0.4.0.

osv:CVE-2024-36400
Complete source record
{
  "id": "71b041c9a4931ade8b605482a7facbc07e1c960f5c4284a1d166cbe0d848fd6a",
  "url": "https://osv.dev/vulnerability/CVE-2024-36400",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "nano-id is unable to generate the correct character set",
    "summary": "nano-id is a unique string ID generator for Rust. Affected versions of the nano-id crate incorrectly generated IDs using a reduced character set in the `nano_id::base62` and `nano_id::base58` functions. Specifically, the `base62` function used a character set of 32 symbols instead of the intended 62 symbols, and the `base58` function used a character set of 16 symbols instead of the intended 58 symbols. Additionally, the `nano_id::gen` macro is also affected when a custom character set that is not a power of 2 in size is specified. It should be noted that `nano_id::base64` is not affected by this vulnerability. This can result in a significant reduction in entropy, making the generated IDs predictable and vulnerable to brute-force attacks when the IDs are used in security-sensitive contexts such as session tokens or unique identifiers. The vulnerability is fixed in 0.4.0.",
    "evidence": "osv:CVE-2024-36400",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2024-36400",
      "aliases": [
        "CVE-2024-36400",
        "GHSA-2hfw-w739-p7x5",
        "GHSA-9hc7-6w9r-wj94",
        "RUSTSEC-2024-0343"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/viz-rs/nano-id",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2209b317ae4ea4caa982a09b0a8e5c0621dd4f83"
                },
                {
                  "fixed": "a9022772b2f1ce38929b5b81eccc670ac9d3ab23"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:viz:nano_id:*:*:*:*:*:rust:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.4.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "a9022772b2f1ce38929b5b81eccc670ac9d3ab23"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.3.2",
            "v0.3.1",
            "v0.2.1",
            "v0.2.0",
            "v0.1.1",
            "v0.1.0",
            "v0.0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-36400.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.760789990Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/36xxx/CVE-2024-36400.json",
        "https://github.com/viz-rs/nano-id/security/advisories/GHSA-9hc7-6w9r-wj94",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-36400",
        "https://github.com/viz-rs/nano-id/commit/a9022772b2f1ce38929b5b81eccc670ac9d3ab23"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-331"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/36xxx/CVE-2024-36400.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-36400",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 493255,
  "published_at": "2024-06-04T14:11:26.945+00:00"
}