CVE-2026-34772

Estado: AnalizadaAlta (8.8)—

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8, apps that allow downloads and programmatically destroy sessions may be vulnerable to a use-after-free. If a session is torn down while a native save-file dialog is open for a download, dismissing the dialog dereferences freed memory, which may lead to a crash or memory corruption. Apps that do not destroy sessions at runtime, or that do not permit downloads, are not affected. This issue has been patched in versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Puntuación base: 8.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.24%
Percentil entre todas las CVEs puntuadas: 14
Fecha de la puntuación: 6/10/2026

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1203 Exploitation for Client Executionexecution90 %
Impacto principalT1059 Command and Scripting Interpreterexecution60 %
Impacto secundarioT1499.004 Application or System Exploitationimpact75 %

CWE-416 (use-after-free) con AV:N, UI:R indica explotación en cliente (T1203). El atacante induce descarga y cierre de sesión simultáneo; la corrupción de memoria puede ejecutar código (T1059) o causar DoS/crash (T1499.004).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Restrict Web-Based Content Privileged Account Management Limit Software Installation Filter Network Traffic Execution Prevention Behavior Prevention on Endpoint

Tecnologías afectadas (1)

Electronjs — Electron

CWE

CWE-416

Referencias

https://github.com/electron/electron/security/advisories/GHSA-9w97-2464-8783

JSON original (NVD)

Mostrar

{
  "id": "CVE-2026-34772",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-34772",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-04-06T15:27:31.566763Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.8,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "HIGH",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 4.7,
        "exploitabilityScore": 1
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.8,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "electron",
          "product": "electron",
          "versions": [
            {
              "status": "affected",
              "version": "< 38.8.6"
            },
            {
              "status": "affected",
              "version": ">= 39.0.0-alpha.1, < 39.8.0"
            },
            {
              "status": "affected",
              "version": ">= 40.0.0-alpha.1, < 40.7.0"
            },
            {
              "status": "affected",
              "version": ">= 41.0.0-alpha.1, < 41.0.0-beta.8"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-04-04T00:16:18.133",
  "references": [
    {
      "url": "https://github.com/electron/electron/security/advisories/GHSA-9w97-2464-8783",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8, apps that allow downloads and programmatically destroy sessions may be vulnerable to a use-after-free. If a session is torn down while a native save-file dialog is open for a download, dismissing the dialog dereferences freed memory, which may lead to a crash or memory corruption. Apps that do not destroy sessions at runtime, or that do not permit downloads, are not affected. This issue has been patched in versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8."
    },
    {
      "lang": "es",
      "value": "Electron es un framework para escribir aplicaciones de escritorio multiplataforma usando JavaScript, HTML y CSS. Antes de las versiones 38.8.6, 39.8.0, 40.7.0 y 41.0.0-beta.8, las aplicaciones que permiten descargas y destruyen sesiones programáticamente pueden ser vulnerables a un uso después de liberación. Si una sesión es terminada mientras un diálogo nativo para guardar archivos está abierto para una descarga, al cerrar el diálogo se desreferencia memoria liberada, lo que puede llevar a un fallo o corrupción de memoria. Las aplicaciones que no destruyen sesiones en tiempo de ejecución, o que no permiten descargas, no se ven afectadas. Este problema ha sido parcheado en las versiones 38.8.6, 39.8.0, 40.7.0 y 41.0.0-beta.8."
    }
  ],
  "lastModified": "2026-07-24T22:10:00.140",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:electronjs:electron:*:*:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9CE003A2-03CC-4355-AA17-2CBD204EC6C3",
              "versionEndExcluding": "38.8.6"
            },
            {
              "criteria": "cpe:2.3:a:electronjs:electron:*:*:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "642CA6B2-000A-480D-B062-80593D150787",
              "versionEndExcluding": "39.8.0",
              "versionStartIncluding": "39.0.0"
            },
            {
              "criteria": "cpe:2.3:a:electronjs:electron:*:*:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E54036E0-1D1F-4265-A2F3-B9C1F88F65ED",
              "versionEndExcluding": "40.7.0",
              "versionStartIncluding": "40.0.0"
            },
            {
              "criteria": "cpe:2.3:a:electronjs:electron:41.0.0:alpha1:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A20225D6-F435-4D09-962D-B162F521B6AD"
            },
            {
              "criteria": "cpe:2.3:a:electronjs:electron:41.0.0:alpha2:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "33712802-EB60-4E9A-83B8-9F2320B70CB4"
            },
            {
              "criteria": "cpe:2.3:a:electronjs:electron:41.0.0:alpha3:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9D0A9142-54FE-47BB-9FEB-5E97528E28FE"
            },
            {
              "criteria": "cpe:2.3:a:electronjs:electron:41.0.0:alpha4:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9E1D191F-DEAE-4DB3-9822-F31AF9FE3BAC"
            },
            {
              "criteria": "cpe:2.3:a:electronjs:electron:41.0.0:alpha5:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "45A8192F-3D2C-4987-9BBE-7ECC3F71965D"
            },
            {
              "criteria": "cpe:2.3:a:electronjs:electron:41.0.0:alpha6:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EEA1A2E5-03DB-46CB-8427-7F31A8A7CE1C"
            },
            {
              "criteria": "cpe:2.3:a:electronjs:electron:41.0.0:beta1:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B2DFCE75-BD3F-4537-B5B8-14097E262EA2"
            },
            {
              "criteria": "cpe:2.3:a:electronjs:electron:41.0.0:beta2:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BC346E25-EA43-4615-8CDB-16D15D46E4FF"
            },
            {
              "criteria": "cpe:2.3:a:electronjs:electron:41.0.0:beta3:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FA5B3C00-CAFC-4995-BF35-9920F3039E77"
            },
            {
              "criteria": "cpe:2.3:a:electronjs:electron:41.0.0:beta4:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3672F3FB-6B5E-40FD-8A92-CB4DD6BC6A93"
            },
            {
              "criteria": "cpe:2.3:a:electronjs:electron:41.0.0:beta5:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9EE4F8AE-21D2-4815-85B7-B7ECCC0D5059"
            },
            {
              "criteria": "cpe:2.3:a:electronjs:electron:41.0.0:beta6:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D195760C-7DD9-4259-9042-EDE65AEAC1D6"
            },
            {
              "criteria": "cpe:2.3:a:electronjs:electron:41.0.0:beta7:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B370859F-24D3-4B25-B580-1A5B6DB94BFE"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}