GHSA-GR2M-V5GQ-V685

Vulnerability from github – Published: 2026-09-29 18:05 – Updated: 2026-09-29 18:05
VLAI
Summary
Electron: Windows opened from a sandboxed top-level document do not inherit its sandbox restrictions
Details

Impact

Windows opened from a sandboxed top-level document did not inherit that document's HTML sandbox restrictions, so content that was meant to run sandboxed could open a window with the app's full origin. GHSA-hq2x-r82h-9wj4 covers the same issue for sandboxed iframes.

Apps are only affected if they render untrusted content in a sandboxed top-level document that allows popups. Apps that deny popups from untrusted content with setWindowOpenHandler are not affected.

Workarounds

Return { action: 'deny' } from setWindowOpenHandler for windows opened by untrusted content.

Fixed Versions

  • 44.0.0-beta.5
  • 43.4.1
  • 42.9.2
  • 41.10.6

For more information

If you have any questions or comments about this advisory, email us at security@electronjs.org

Severity
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "electron"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "41.10.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "electron"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "42.0.0-alpha.1"
            },
            {
              "fixed": "42.9.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "electron"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "43.0.0-alpha.1"
            },
            {
              "fixed": "43.4.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "electron"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "44.0.0-alpha.1"
            },
            {
              "fixed": "44.0.0-beta.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-102674"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-266",
      "CWE-693"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-29T18:05:11Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Impact\n\nWindows opened from a sandboxed top-level document did not inherit that document\u0027s HTML `sandbox` restrictions, so content that was meant to run sandboxed could open a window with the app\u0027s full origin. GHSA-hq2x-r82h-9wj4 covers the same issue for sandboxed iframes.\n\nApps are only affected if they render untrusted content in a sandboxed top-level document that allows popups. Apps that deny popups from untrusted content with `setWindowOpenHandler` are not affected.\n\n### Workarounds\n\nReturn `{ action: \u0027deny\u0027 }` from `setWindowOpenHandler` for windows opened by untrusted content.\n\n### Fixed Versions\n\n* `44.0.0-beta.5`\n* `43.4.1`\n* `42.9.2`\n* `41.10.6`\n\n### For more information\n\nIf you have any questions or comments about this advisory, email us at [security@electronjs.org](mailto:security@electronjs.org)",
  "id": "GHSA-gr2m-v5gq-v685",
  "modified": "2026-09-29T18:05:11Z",
  "published": "2026-09-29T18:05:11Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/security/advisories/GHSA-gr2m-v5gq-v685"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/commit/29fc130569f970e91e355383821a4af0f25724a2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/commit/3ecf3e74f4be6e2360644679b0b4698742be0e1d"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/commit/6594d5a5b074cf501da084dc7908d3df0d68a886"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/commit/e9c4d3cbe912e18d7c63af78e63e98ae7a48cd3a"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/electron/electron"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/releases/tag/v41.10.6"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/releases/tag/v42.9.2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/releases/tag/v43.4.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/releases/tag/v44.0.0-beta.5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Electron: Windows opened from a sandboxed top-level document do not inherit its sandbox restrictions"
}



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