{
  "affected": [
    {
      "affectedData": [
        {
          "product": "kamailio",
          "vendor": "kamailio",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.8.8"
            },
            {
              "status": "affected",
              "version": "\u003e= 6.0.0, \u003c 6.0.6"
            },
            {
              "status": "affected",
              "version": "\u003e= 6.1.0, \u003c 6.1.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:kamailio:kamailio:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "3B40580E-F077-4ECD-A293-C5376753A14F",
              "versionEndExcluding": "5.8.8",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:kamailio:kamailio:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "EEF7235B-DFA7-4445-81F2-490609E9FCD6",
              "versionEndExcluding": "6.0.6",
              "versionStartIncluding": "6.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:kamailio:kamailio:6.1.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "4A33A90A-7EC3-407F-BD7B-E13A2617B59D",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "Kamailio es una implementaci\u00f3n de c\u00f3digo abierto de un Servidor de Se\u00f1alizaci\u00f3n SIP. Antes de 6.1.1, 6.0.6 y 5.8.8, un acceso fuera de l\u00edmites en el n\u00facleo de Kamailio (anteriormente OpenSER y SER) permite a atacantes remotos causar una denegaci\u00f3n de servicio (ca\u00edda del proceso) mediante un paquete de datos especialmente dise\u00f1ado enviado por TCP. El problema afecta a las instancias de Kamailio que tienen oyentes TCP o TLS. Esta vulnerabilidad est\u00e1 corregida en 5.1.1, 6.0.6 y 5.8.8."
    }
  ],
  "id": "CVE-2026-39863",
  "lastModified": "2026-07-24T21:10:00.143",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-39863",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-09T13:52:31.304154Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-08T20:16:26.550",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/kamailio/kamailio/security/advisories/GHSA-2wj4-f825-2h2f"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}