{
  "cveId": "CVE-2026-39863",
  "url": "https://patchblox.com/security/cve/CVE-2026-39863",
  "summary": "CVE-2026-39863 is fixed in kamailio on 1 platform, first by DEBIAN-CVE-2026-39863, released April 8, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "kamailio: Kamailio is an open source implementation of a SIP Signaling Server",
  "description": "Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.1.1, 6.0.6, and 5.8.8, an out-of-bounds access in the core of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted data packet sent over TCP. The issue impacts Kamailio instances having TCP or TLS listeners. This vulnerability is fixed in 5.1.1, 6.0.6, and 5.8.8.",
  "published": "2026-04-08T20:16:26Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00471,
  "epssPercentile": 0.41024,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "kamailio",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.0.1-1\u002Bdeb13u2",
      "fix": "DEBIAN-CVE-2026-39863",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-39863",
      "released": "2026-04-08T20:16:26Z"
    },
    {
      "platform": "linux",
      "product": "kamailio",
      "release": "Debian 14",
      "fixedVersion": "6.1.1-2",
      "fix": "DEBIAN-CVE-2026-39863",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-39863",
      "released": "2026-04-08T20:16:26Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}