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CVE-2026-49848

Estado: AnalizadaMedia (4.3)—

FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to version 1.11.1, mod_verto's check_auth userauth branch wrote request-supplied userVariables into the connection state before comparing the supplied password. The writes are append-only and the connection is not closed on a failed compare, so values declared on bad-password attempts persisted on the same WebSocket and carried into a subsequent successful login on that connection. This issue has been patched in version 1.11.1.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Freeswitch — Freeswitch

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-49848",
  "cveTags": [],
  "metrics": {
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      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-49848",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-06-09T16:50:30.238651Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 4.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
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      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "signalwire",
          "product": "freeswitch",
          "versions": [
            {
              "status": "affected",
              "version": "< 1.11.1"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-06-09T17:17:48.460",
  "references": [
    {
      "url": "https://github.com/signalwire/freeswitch/releases/tag/v1.11.1",
      "tags": [
        "Release Notes"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/signalwire/freeswitch/security/advisories/GHSA-j38x-xm7f-9p2f",
      "tags": [
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      ],
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  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to version 1.11.1, mod_verto's check_auth userauth branch wrote request-supplied userVariables into the connection state before comparing the supplied password. The writes are append-only and the connection is not closed on a failed compare, so values declared on bad-password attempts persisted on the same WebSocket and carried into a subsequent successful login on that connection. This issue has been patched in version 1.11.1."
    },
    {
      "lang": "es",
      "value": "FreeSWITCH es una Pila de Telecomunicaciones Definida por Software que permite la transformación digital desde conmutadores de telecomunicaciones propietarios a una implementación de software que se ejecuta en cualquier hardware comercial. Antes de la versión 1.11.1, la rama userauth de check_auth del módulo mod_verto escribía las userVariables suministradas en la solicitud en el estado de la conexión antes de comparar la contraseña suministrada. Las escrituras son solo de adición y la conexión no se cierra en una comparación fallida, por lo que los valores declarados en intentos de contraseña incorrecta persistían en el mismo WebSocket y se trasladaban a un inicio de sesión exitoso posterior en esa conexión. Este problema ha sido parcheado en la versión 1.11.1."
    }
  ],
  "lastModified": "2026-07-23T08:10:00.137",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "vulnerable": true,
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              "versionEndExcluding": "1.11.1"
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        }
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  "sourceIdentifier": "security-advisories@github.com"
}