GHSA-P2RR-RVMM-C5FP

Vulnerability from github – Published: 2026-08-05 17:56 – Updated: 2026-08-05 17:56
VLAI
Summary
Electron: Sandboxed iframes can launch external protocol handlers
Details

Impact

Requests to open external protocol URLs from web content did not take iframe sandbox restrictions into account, so a sandboxed iframe could cause an OS-registered external application to be launched. The frame's sandbox state was also not made available to the app's permission handlers.

Apps are only affected if they render untrusted content in sandboxed iframes and grant the openExternal permission (granted by default when no setPermissionRequestHandler is installed). Apps whose permission handler denies openExternal for untrusted content are not affected.

Workarounds

Install a setPermissionRequestHandler that denies the openExternal permission for untrusted content.

Fixed Versions

  • 42.0.0-beta.3
  • 41.2.1
  • 40.9.0
  • 39.8.8

For more information

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

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

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "electron"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "39.8.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "electron"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "40.0.0-alpha.1"
            },
            {
              "fixed": "40.9.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "electron"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "41.0.0-alpha.1"
            },
            {
              "fixed": "41.2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "electron"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "42.0.0-alpha.1"
            },
            {
              "fixed": "42.0.0-beta.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-70612"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-284"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-05T17:56:50Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\nRequests to open external protocol URLs from web content did not take iframe sandbox restrictions into account, so a sandboxed iframe could cause an OS-registered external application to be launched. The frame\u0027s sandbox state was also not made available to the app\u0027s permission handlers.\n\nApps are only affected if they render untrusted content in sandboxed iframes and grant the `openExternal` permission (granted by default when no `setPermissionRequestHandler` is installed). Apps whose permission handler denies `openExternal` for untrusted content are not affected.\n\n### Workarounds\nInstall a `setPermissionRequestHandler` that denies the `openExternal` permission for untrusted content.\n\n### Fixed Versions\n* `42.0.0-beta.3`\n* `41.2.1`\n* `40.9.0`\n* `39.8.8`\n\n### For more information\nIf you have any questions or comments about this advisory, email Electron at [security@electronjs.org](mailto:security@electronjs.org)",
  "id": "GHSA-p2rr-rvmm-c5fp",
  "modified": "2026-08-05T17:56:50Z",
  "published": "2026-08-05T17:56:50Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/security/advisories/GHSA-p2rr-rvmm-c5fp"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/pull/50961"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/pull/50962"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/pull/50963"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/pull/50964"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/commit/08b9d0a220e267d1a2402a44bdd01a2e9aa320b5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/commit/2764e4c35168855f614876051823db4f58a3714a"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/commit/477dcf7afc6550715f9ec5e6f39ee38e5dd7bf39"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/commit/c39e3d5687d57434c8d5fe814c5152efd2f631c3"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/electron/electron"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/releases/tag/v39.8.8"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/releases/tag/v40.9.0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/releases/tag/v41.2.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/releases/tag/v42.0.0-beta.3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Electron: Sandboxed iframes can launch external protocol handlers"
}



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