FKIE_CVE-2026-34778

Vulnerability from fkie_nvd - Published: 2026-04-04 00:16 - Updated: 2026-07-24 22:10
Severity
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Summary
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0, a service worker running in a session could spoof reply messages on the internal IPC channel used by webContents.executeJavaScript() and related methods, causing the main-process promise to resolve with attacker-controlled data. Apps are only affected if they have service workers registered and use the result of webContents.executeJavaScript() (or webFrameMain.executeJavaScript()) in security-sensitive decisions. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0.
References
security-advisories@github.comhttps://github.com/electron/electron/security/advisories/GHSA-xj5x-m3f3-5x3hVendor Advisory
Impacted products
Vendor Product Version
electronjs electron *
electronjs electron *
electronjs electron *
electronjs electron 41.0.0
electronjs electron 41.0.0
electronjs electron 41.0.0
electronjs electron 41.0.0
electronjs electron 41.0.0
electronjs electron 41.0.0
electronjs electron 41.0.0
electronjs electron 41.0.0
electronjs electron 41.0.0
electronjs electron 41.0.0
electronjs electron 41.0.0
electronjs electron 41.0.0
electronjs electron 41.0.0
electronjs electron 41.0.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "electron",
          "vendor": "electron",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 38.8.6"
            },
            {
              "status": "affected",
              "version": "\u003e= 39.0.0-alpha.1, \u003c 39.8.1"
            },
            {
              "status": "affected",
              "version": "\u003e= 40.0.0-alpha.1, \u003c 40.8.1"
            },
            {
              "status": "affected",
              "version": "\u003e= 41.0.0-alpha.1, \u003c 41.0.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
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              "matchCriteriaId": "9CE003A2-03CC-4355-AA17-2CBD204EC6C3",
              "versionEndExcluding": "38.8.6",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "8F28D187-306E-4C9D-ADED-56DD79B04AF3",
              "versionEndExcluding": "39.8.1",
              "versionStartIncluding": "39.0.0",
              "vulnerable": true
            },
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              "versionEndExcluding": "40.8.1",
              "versionStartIncluding": "40.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:electronjs:electron:41.0.0:alpha1:*:*:*:node.js:*:*",
              "matchCriteriaId": "A20225D6-F435-4D09-962D-B162F521B6AD",
              "vulnerable": true
            },
            {
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            },
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              "vulnerable": true
            },
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              "vulnerable": true
            },
            {
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              "matchCriteriaId": "B2DFCE75-BD3F-4537-B5B8-14097E262EA2",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "BC346E25-EA43-4615-8CDB-16D15D46E4FF",
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              "matchCriteriaId": "FA5B3C00-CAFC-4995-BF35-9920F3039E77",
              "vulnerable": true
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              "matchCriteriaId": "3672F3FB-6B5E-40FD-8A92-CB4DD6BC6A93",
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              "matchCriteriaId": "B370859F-24D3-4B25-B580-1A5B6DB94BFE",
              "vulnerable": true
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              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "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, 39.8.1, 40.8.1, and 41.0.0, a service worker running in a session could spoof reply messages on the internal IPC channel used by webContents.executeJavaScript() and related methods, causing the main-process promise to resolve with attacker-controlled data. Apps are only affected if they have service workers registered and use the result of webContents.executeJavaScript() (or webFrameMain.executeJavaScript()) in security-sensitive decisions. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0."
    },
    {
      "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, 39.8.1, 40.8.1 y 41.0.0, un service worker ejecut\u00e1ndose en una sesi\u00f3n podr\u00eda falsificar mensajes de respuesta en el canal IPC interno utilizado por webContents.executeJavaScript() y m\u00e9todos relacionados, causando que la promesa del proceso principal se resolviera con datos controlados por el atacante. Las aplicaciones solo se ven afectadas si tienen service workers registrados y usan el resultado de webContents.executeJavaScript() (o webFrameMain.executeJavaScript()) en decisiones sensibles a la seguridad. Este problema ha sido parcheado en las versiones 38.8.6, 39.8.1, 40.8.1 y 41.0.0."
    }
  ],
  "id": "CVE-2026-34778",
  "lastModified": "2026-07-24T22:10:00.140",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 4.2,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-34778",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-06T15:50:39.913943Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-04T00:16:19.060",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/electron/electron/security/advisories/GHSA-xj5x-m3f3-5x3h"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-290"
        },
        {
          "lang": "en",
          "value": "CWE-345"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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