{
  "cveId": "CVE-2023-4639",
  "url": "https://patchblox.com/security/cve/CVE-2023-4639",
  "summary": "CVE-2023-4639 is fixed in undertow on 1 platform, first by CVE-2023-4639, released November 17, 2024. It is not reported as exploited. Patch Radar priority: High.",
  "title": "undertow: A flaw was found in Undertow, which incorrectly parses cookies with certain value-delimiting characters in incoming r...",
  "description": "A flaw was found in Undertow, which incorrectly parses cookies with certain value-delimiting characters in incoming requests. This issue could allow an attacker to construct a cookie value to exfiltrate HttpOnly cookie values or spoof arbitrary additional cookie values, leading to unauthorized data access or modification. The main threat from this flaw impacts data confidentiality and integrity.",
  "published": "2024-11-17T11:15:05Z",
  "severity": "high",
  "cvss": 7.4,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
  "epss": 0.01093,
  "epssPercentile": 0.65648,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "undertow",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "2.3.18-1",
      "fix": "CVE-2023-4639",
      "url": "https://patchblox.com/security/fix/linux/cve-2023-4639",
      "released": "2024-11-17T11:15:05Z"
    },
    {
      "platform": "linux",
      "product": "undertow",
      "release": "Debian 14",
      "fixedVersion": "2.3.18-1",
      "fix": "DEBIAN-CVE-2023-4639",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-4639",
      "released": "2024-11-17T11:15:05Z"
    }
  ],
  "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"
  }
}