CVE-2026-34775: Electron NodeIntegrationInWorker Not Correctly Scoped Vulnerability

MODERATE
Advisory Identifier: GHSA-xwr5-m59h-vwqr
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CVSS 6.8
CWE-653
Published
Advisory Summary

CVE-2026-34775 is a MODERATE (CVSS 6.8) nodeintegrationinworker not correctly scoped vulnerability (CWE-653: Improper Isolation or Compartmentalization) affecting Electron libraries in the npm ecosystem. The issue involves nodeintegrationinworker not correctly scoped in shared renderer processes. Remediation is available by upgrading affected packages to version 38.8.6, 39.8.4, 40.8.4, 41.0.0.

CVE-2026-34775 at a Glance

CVE Identifier CVE-2026-34775
GHSA Identifier GHSA-xwr5-m59h-vwqr
Severity MODERATE
CVSS v3.1 Base Score 6.8
CWE Classification CWE-653: Improper Isolation or Compartmentalization
Affected Product Electron
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 6.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2026-34775

To remediate this vulnerability, upgrade all affected Electron dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

electron fixed: 38.8.6 
npm install electron@38.8.6
electron fixed: 39.8.4 
npm install electron@39.8.4
electron fixed: 40.8.4 
npm install electron@40.8.4
electron fixed: 41.0.0 
npm install electron@41.0.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls electron

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-34775, inspect your project dependencies using npm:

npm ls electron

Analyze the terminal output to locate any version of Electron in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 38.8.6), your application is affected.

Note: The npm ls electron command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-653: Improper Isolation or Compartmentalization, where the product does not properly compartmentalize or isolate functionality, processes, or resources that require different privilege levels, rights, or permissions. In Electron, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact The `nodeIntegrationInWorker` webPreference was not correctly scoped in all configurations. In certain process-sharing scenarios, workers spawned in frames configured with `nodeIntegrationInWorker: false` could still receive Node.js integration. Apps are only affected if they enable `nodeIntegrationInWorker`. Apps that do not use `nodeIntegrationInWorker` are not affected. ### Workarounds Avoid enabling `nodeIntegrationInWorker` in apps that also open child windows or embed content with differing webPreferences. ### Fixed Versions * `41.0.0` * `40.8.4` * `39.8.4` * `38.8.6` ### For more information If there are any questions or comments about this advisory, please email [security@electronjs.org](mailto:security@electronjs.org)

CVE-2026-34775 Affected Electron Versions

4 component(s)
Fixed Versions:
38.8.639.8.440.8.441.0.0
Product / Package Ecosystem Affected Versions Fixed Version
electron
npm/electron
npm
< 38.8.6
38.8.6
electron
npm/electron
npm
≥ 39.0.0-alpha.1
< 39.8.4
39.8.4
electron
npm/electron
npm
≥ 40.0.0-alpha.1
< 40.8.4
40.8.4
electron
npm/electron
npm
≥ 41.0.0-alpha.1
< 41.0.0
41.0.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/electron/electron/security/advisories/GHSA-xwr5-m59h-vwqr
NVD — CVE-2026-34775 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-34775
Electron Source Repository REPOSITORY
https://github.com/electron/electron

Frequently Asked Questions

What is CVE-2026-34775?
CVE-2026-34775 is a security vulnerability in Electron involving nodeIntegrationInWorker not correctly scoped in shared renderer processes under CWE-653: Improper Isolation or Compartmentalization.
Which Electron versions are affected?
Affected versions include releases prior to 38.8.6, 39.8.4, 40.8.4, 41.0.0 across affected packages: electron.
What version fixes CVE-2026-34775?
Upgrading to 38.8.6, 39.8.4, 40.8.4, 41.0.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is electron affected?
Yes, electron is affected in releases prior to 38.8.6, 39.8.4, 40.8.4, 41.0.0. Upgrade your dependency to 38.8.6, 39.8.4, 40.8.4, 41.0.0 or later.
What is the CVSS score of CVE-2026-34775?
CVE-2026-34775 has a CVSS v3.1 base score of 6.8 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N.
What CWE is associated with CVE-2026-34775?
CVE-2026-34775 is classified under CWE-653: Improper Isolation or Compartmentalization (The product does not properly compartmentalize or isolate functionality, processes, or resources that require different privilege levels, rights, or permissions.).
How can I check npm dependencies for CVE-2026-34775?
Run the dependency tree command: 'npm ls electron'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-xwr5-m59h-vwqr",
  "modified" : "2026-04-06T23:11:00Z",
  "published" : "2026-04-03T02:43:05Z",
  "aliases" : [ "CVE-2026-34775" ],
  "summary" : "Electron: nodeIntegrationInWorker not correctly scoped in shared renderer processes",
  "details" : "### Impact\nThe `nodeIntegrationInWorker` webPreference was not correctly scoped in all configurations. In certain process-sharing scenarios, workers spawned in frames configured with `nodeIntegrationInWorker: false` could still receive Node.js integration.\n\nApps are only affected if they enable `nodeIntegrationInWorker`. Apps that do not use `nodeIntegrationInWorker` are not affected.\n\n### Workarounds\nAvoid enabling `nodeIntegrationInWorker` in apps that also open child windows or embed content with differing webPreferences.\n\n### Fixed Versions\n* `41.0.0`\n* `40.8.4`\n* `39.8.4`\n* `38.8.6`\n\n### For more information\nIf there are any questions or comments about this advisory, please email [security@electronjs.org](mailto:security@electronjs.org)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "electron"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "38.8.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "electron"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "39.0.0-alpha.1"
      }, {
        "fixed" : "39.8.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "electron"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "40.0.0-alpha.1"
      }, {
        "fixed" : "40.8.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "electron"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "41.0.0-alpha.1"
      }, {
        "fixed" : "41.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/electron/electron/security/advisories/GHSA-xwr5-m59h-vwqr"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-34775"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/electron/electron"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-653" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-03T02:43:05Z",
    "nvd_published_at" : "2026-04-04T00:16:18Z"
  }
}