{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.0",
  "cveMetadata": {
    "cveId": "CVE-2026-32284"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc"
      },
      "title": "Denial of service in github.com/shamaton/msgpack",
      "descriptions": [
        {
          "lang": "en",
          "value": "The msgpack decoder fails to properly validate the input buffer length when processing truncated fixext data (format codes 0xd4-0xd8). This can lead to an out-of-bounds read and a runtime panic, allowing a denial of service attack."
        }
      ],
      "affected": [
        {
          "vendor": "github.com/shamaton/msgpack",
          "product": "github.com/shamaton/msgpack",
          "collectionURL": "https://pkg.go.dev",
          "packageName": "github.com/shamaton/msgpack",
          "programRoutines": [
            {
              "name": "Unmarshal"
            },
            {
              "name": "UnmarshalAsMap"
            },
            {
              "name": "UnmarshalAsArray"
            },
            {
              "name": "DecodeStructAsArray"
            },
            {
              "name": "DecodeStructAsMap"
            }
          ],
          "defaultStatus": "affected"
        },
        {
          "vendor": "github.com/shamaton/msgpack/v2",
          "product": "github.com/shamaton/msgpack/v2",
          "collectionURL": "https://pkg.go.dev",
          "packageName": "github.com/shamaton/msgpack/v2",
          "programRoutines": [
            {
              "name": "Unmarshal"
            },
            {
              "name": "UnmarshalAsMap"
            },
            {
              "name": "UnmarshalAsArray"
            }
          ],
          "defaultStatus": "affected"
        },
        {
          "vendor": "github.com/shamaton/msgpack/v3",
          "product": "github.com/shamaton/msgpack/v3",
          "collectionURL": "https://pkg.go.dev",
          "packageName": "github.com/shamaton/msgpack/v3",
          "programRoutines": [
            {
              "name": "Unmarshal"
            },
            {
              "name": "UnmarshalAsMap"
            },
            {
              "name": "UnmarshalAsArray"
            }
          ],
          "defaultStatus": "affected"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-125: Out-of-bounds Read"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://github.com/shamaton/msgpack/issues/59"
        },
        {
          "url": "https://github.com/golang/vulndb/issues/4513"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-4513"
        }
      ]
    }
  }
}