{
  "schema_version": "1.4.0",
  "id": "GHSA-r88r-gmrh-7j83",
  "modified": "2025-04-11T23:46:34Z",
  "published": "2022-12-28T00:30:23Z",
  "aliases": [
    "CVE-2021-4235"
  ],
  "summary": "YAML Go package vulnerable to denial of service",
  "details": "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.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "gopkg.in/yaml.v2"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.2.3"
            }
          ]
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/go-yaml/yaml"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "2.1.0"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-4235"
    },
    {
      "type": "WEB",
      "url": "https://github.com/go-yaml/yaml/pull/375"
    },
    {
      "type": "WEB",
      "url": "https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/go-yaml/yaml"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2021-0061"
    }
  ],
  "database_specific": {
    "cwe_ids": [],
    "severity": "MODERATE",
    "github_reviewed": true,
    "github_reviewed_at": "2022-12-30T19:02:10Z",
    "nvd_published_at": "2022-12-27T22:15:00Z"
  }
}