{
  "cveId": "CVE-2022-39956",
  "url": "https://patchblox.com/security/cve/CVE-2022-39956",
  "summary": "CVE-2022-39956 is fixed in modsecurity-crs on 1 platform, first by DEBIAN-CVE-2022-39956, released September 20, 2022. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "modsecurity-crs: The OWASP ModSecurity Core Rule Set (CRS) is affected by a partial rule set bypass for HTTP multipart requests by sub...",
  "description": "The OWASP ModSecurity Core Rule Set (CRS) is affected by a partial rule set bypass for HTTP multipart requests by submitting a payload that uses a character encoding scheme via the Content-Type or the deprecated Content-Transfer-Encoding multipart MIME header fields that will not be decoded and inspected by the web application firewall engine and the rule set. The multipart payload will therefore bypass detection. A vulnerable backend that supports these encoding schemes can potentially be exploited. The legacy CRS versions 3.0.x and 3.1.x are affected, as well as the currently supported versions 3.2.1 and 3.3.2. Integrators and users are advised upgrade to 3.2.2 and 3.3.3 respectively. The mitigation against these vulnerabilities depends on the installation of the latest ModSecurity version (v2.9.6 / v3.0.8).",
  "published": "2022-09-20T07:15:12Z",
  "severity": "critical",
  "cvss": 9.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.01212,
  "epssPercentile": 0.68709,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "modsecurity-crs",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "3.3.4-1",
      "fix": "DEBIAN-CVE-2022-39956",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-39956",
      "released": "2022-09-20T07:15:12Z"
    },
    {
      "platform": "linux",
      "product": "modsecurity-crs",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "3.3.4-1",
      "fix": "DEBIAN-CVE-2022-39956",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-39956",
      "released": "2022-09-20T07:15:12Z"
    },
    {
      "platform": "linux",
      "product": "modsecurity-crs",
      "release": "Debian 14",
      "fixedVersion": "3.3.4-1",
      "fix": "DEBIAN-CVE-2022-39956",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-39956",
      "released": "2022-09-20T07:15:12Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}