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CVE-2026-34774

Estado: ModificadaAlta (8.1)—

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 39.8.1, 40.7.0, and 41.0.0, apps that use offscreen rendering and allow child windows via window.open() may be vulnerable to a use-after-free. If the parent offscreen WebContents is destroyed while a child window remains open, subsequent paint frames on the child dereference freed memory, which may lead to a crash or memory corruption. Apps are only affected if they use offscreen rendering (webPreferences.offscreen: true) and their setWindowOpenHandler permits child windows. Apps that do not use offscreen rendering, or that deny child windows, are not affected. This issue has been patched in versions 39.8.1, 40.7.0, and 41.0.0.

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).

🎯 Técnicas ATT&CK

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

Inferido por reglas deterministas a partir del vector CVSS y la CWE. Solo orientativo.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementVulnerability ScanningRestrict Web-Based ContentNetwork SegmentationLimit Software InstallationLimit Access to Resource Over Network

Tecnologías afectadas (1)

Electronjs — Electron

CWE

Referencias

JSON original (NVD)

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              "automatable": "no"
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              "technicalImpact": "total"
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          "version": "2.0.3",
          "timestamp": "2026-04-07T00:00:00+00:00"
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      "value": "Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 39.8.1, 40.7.0, and 41.0.0, apps that use offscreen rendering and allow child windows via window.open() may be vulnerable to a use-after-free. If the parent offscreen WebContents is destroyed while a child window remains open, subsequent paint frames on the child dereference freed memory, which may lead to a crash or memory corruption. Apps are only affected if they use offscreen rendering (webPreferences.offscreen: true) and their setWindowOpenHandler permits child windows. Apps that do not use offscreen rendering, or that deny child windows, are not affected. This issue has been patched in versions 39.8.1, 40.7.0, and 41.0.0."
    },
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      "lang": "es",
      "value": "Electron es un framework para escribir aplicaciones de escritorio multiplataforma usando JavaScript, HTML y CSS. Antes de las versiones 39.8.1, 40.7.0 y 41.0.0, las aplicaciones que usan renderizado fuera de pantalla y permiten ventanas secundarias a través de window.open() pueden ser vulnerables a un uso después de liberación. Si el WebContents padre fuera de pantalla es destruido mientras una ventana secundaria permanece abierta, los subsiguientes fotogramas de pintura en la ventana secundaria desreferencian memoria liberada, lo que puede llevar a un fallo o corrupción de memoria. Las aplicaciones solo se ven afectadas si usan renderizado fuera de pantalla (webPreferences.offscreen: true) y su setWindowOpenHandler permite ventanas secundarias. Las aplicaciones que no usan renderizado fuera de pantalla, o que deniegan ventanas secundarias, no se ven afectadas. Este problema ha sido parcheado en las versiones 39.8.1, 40.7.0 y 41.0.0."
    }
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  "lastModified": "2026-07-24T22:10:00.140",
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