GHSA-4F78-QHMW-8J8M

Vulnerability from github – Published: 2026-08-05 17:32 – Updated: 2026-08-05 17:32
VLAI
Summary
Electron: DevTools JavaScript Injection via Unsanitized Dock State Parameter
Details

Impact

The mode option of webContents.openDevTools() was not sanitized before use by the DevTools frontend. If an attacker can influence this value, script under their control may run in the DevTools context, which in unsandboxed configurations has access to Node.js.

Apps are only affected if untrusted input can reach the mode argument of openDevTools(), or if untrusted content can call openDevTools() on a <webview> it embeds. Apps that only ever pass a fixed dock mode are not affected.

Workarounds

Only pass fixed, allowlisted values (right, bottom, undocked, detach) as the DevTools mode, and do not expose openDevTools to untrusted content.

Fixed Versions

  • 42.0.0-beta.1
  • 41.2.0
  • 40.9.0
  • 39.8.7

For more information

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

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

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "electron"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "39.8.7"
            }
          ],
          "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": "41.2.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "electron"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "42.0.0-alpha.1"
            },
            {
              "fixed": "42.0.0-beta.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-70609"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-94",
      "CWE-116"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-05T17:32:47Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\nThe `mode` option of `webContents.openDevTools()` was not sanitized before use by the DevTools frontend. If an attacker can influence this value, script under their control may run in the DevTools context, which in unsandboxed configurations has access to Node.js.\n\nApps are only affected if untrusted input can reach the `mode` argument of `openDevTools()`, or if untrusted content can call `openDevTools()` on a `\u003cwebview\u003e` it embeds. Apps that only ever pass a fixed dock mode are not affected.\n\n### Workarounds\nOnly pass fixed, allowlisted values (`right`, `bottom`, `undocked`, `detach`) as the DevTools `mode`, and do not expose `openDevTools` to untrusted content.\n\n### Fixed Versions\n* `42.0.0-beta.1`\n* `41.2.0`\n* `40.9.0`\n* `39.8.7`\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-4f78-qhmw-8j8m",
  "modified": "2026-08-05T17:32:47Z",
  "published": "2026-08-05T17:32:47Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/security/advisories/GHSA-4f78-qhmw-8j8m"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/pull/50665"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/pull/50666"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/pull/50667"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/pull/50668"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/commit/04614eed17986bddc43eb509ec870424ee6a47d1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/commit/2046ae87731d80a7b535512ae19acb529e10e33b"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/commit/969741f9f847c5c583f6bbc63ca22549dbd954ce"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/commit/efc4d3c6b6f1c04f658ca0d9d2512dcfe78eb7ba"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/electron/electron"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/releases/tag/v39.8.7"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/releases/tag/v40.9.0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/releases/tag/v41.2.0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/releases/tag/v42.0.0-beta.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Electron: DevTools JavaScript Injection via Unsanitized Dock State Parameter"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.