{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.0",
  "cveMetadata": {
    "cveId": "CVE-2021-4235"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc"
      },
      "descriptions": [
        {
          "lang": "en",
          "value": "Due to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume significant system resources. If parsing user input, this may be used as a denial of service vector."
        }
      ],
      "affected": [
        {
          "vendor": "gopkg.in/yaml.v2",
          "product": "gopkg.in/yaml.v2",
          "collectionURL": "https://pkg.go.dev",
          "packageName": "gopkg.in/yaml.v2",
          "versions": [
            {
              "version": "0",
              "lessThan": "2.2.3",
              "status": "affected",
              "versionType": "semver"
            }
          ],
          "programRoutines": [
            {
              "name": "decoder.unmarshal"
            },
            {
              "name": "Decoder.Decode"
            },
            {
              "name": "Unmarshal"
            },
            {
              "name": "UnmarshalStrict"
            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "github.com/go-yaml/yaml",
          "product": "github.com/go-yaml/yaml",
          "collectionURL": "https://pkg.go.dev",
          "packageName": "github.com/go-yaml/yaml",
          "programRoutines": [
            {
              "name": "decoder.unmarshal"
            },
            {
              "name": "Decoder.Decode"
            },
            {
              "name": "Unmarshal"
            },
            {
              "name": "UnmarshalStrict"
            }
          ],
          "defaultStatus": "affected"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE 400: Uncontrolled Resource Consumption"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://github.com/go-yaml/yaml/pull/375"
        },
        {
          "url": "https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2021-0061"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "@simonferquel"
        }
      ]
    }
  }
}