{
  "cveId": "CVE-2021-4235",
  "url": "https://patchblox.com/security/cve/CVE-2021-4235",
  "summary": "CVE-2021-4235 is fixed in 3 products on 1 platform, first by golang-gopkg-yaml.v2-dev 0.0\u002Bgit20170407.0.cd8b52f-1ubuntu2\u002Besm1, released December 27, 2022. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "golang-yaml.v2: Due to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume significant system re...",
  "description": "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.",
  "published": "2022-12-27T14:15:00Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
  "epss": 0.00427,
  "epssPercentile": 0.37223,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "golang-gopkg-yaml.v2-dev",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "0.0\u002Bgit20170407.0.cd8b52f-1ubuntu2\u002Besm1",
      "fix": "golang-gopkg-yaml.v2-dev 0.0\u002Bgit20170407.0.cd8b52f-1ubuntu2\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-golang-gopkg-yaml.v2-dev-0.0-git20170407.0.cd8b52f-1ubuntu2-esm1",
      "released": "2022-12-27T14:15:00Z"
    },
    {
      "platform": "linux",
      "product": "golang-gopkg-yaml.v2-dev",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.2.2-1ubuntu0.1",
      "fix": "golang-gopkg-yaml.v2-dev 2.2.2-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-golang-gopkg-yaml.v2-dev-2.2.2-1ubuntu0.1",
      "released": "2022-12-27T14:15:00Z"
    },
    {
      "platform": "linux",
      "product": "golang-yaml.v2",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "2.2.8-1",
      "fix": "DEBIAN-CVE-2021-4235",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-4235",
      "released": "2022-12-27T22:15:11Z"
    },
    {
      "platform": "linux",
      "product": "golang-yaml.v2",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "2.2.8-1",
      "fix": "DEBIAN-CVE-2021-4235",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-4235",
      "released": "2022-12-27T22:15:11Z"
    },
    {
      "platform": "linux",
      "product": "golang-yaml.v2",
      "release": "Debian 14",
      "fixedVersion": "2.2.8-1",
      "fix": "DEBIAN-CVE-2021-4235",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-4235",
      "released": "2022-12-27T22:15:11Z"
    },
    {
      "platform": "linux",
      "product": "golang-yaml.v2-dev",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "0.0\u002Bgit20170407.0.cd8b52f-1ubuntu2\u002Besm1",
      "fix": "golang-yaml.v2-dev 0.0\u002Bgit20170407.0.cd8b52f-1ubuntu2\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-golang-yaml.v2-dev-0.0-git20170407.0.cd8b52f-1ubuntu2-esm1",
      "released": "2022-12-27T14:15:00Z"
    },
    {
      "platform": "linux",
      "product": "golang-yaml.v2-dev",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.2.2-1ubuntu0.1",
      "fix": "golang-yaml.v2-dev 2.2.2-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-golang-yaml.v2-dev-2.2.2-1ubuntu0.1",
      "released": "2022-12-27T14:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}