CVE-2026-102676

Description

A flaw was found in Electron. This vulnerability allows untrusted guest content loaded inside an embedded web view to run background worker tasks with elevated privileges. By enabling Node.js integration within background web workers, an attacker can bypass security restrictions set by the host application that disable Node.js access. Successful exploitation can lead to privilege escalation and arbitrary code execution within the context of the host application.

Statement

A flaw was found in Electron where an embedded guest can enable nodeIntegrationInWorker for background Web Workers even when Node.js integration is disabled in the unsandboxed embedder. Untrusted guest content loaded inside a web view can exploit this behavior to spawn a Node-enabled worker, bypassing host security restrictions to achieve privilege escalation and arbitrary code execution within the context of the host application process.

Mitigation

Disable the <webview> tag in application configurations or ensure the host embedder process remains strictly sandboxed.

Common Vulnerability Scoring System (CVSS) Score Details

Info alert:Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 Score Breakdown

Red HatNVDcve.org
Base Score8.39.88.3
Attack VectorNetworkNetworkNetwork
Attack ComplexityHighLowHigh
Privileges RequiredNoneNoneNone
User InteractionRequiredNoneRequired
ScopeChangedUnchangedChanged
ConfidentialityHighHighHigh
Integrity ImpactHighHighHigh
Availability ImpactHighHighHigh

Vector

Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

cve.org: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

Understanding the Weakness (CWE)

CWE-266

Access Control

Technical Impact: Gain Privileges or Assume Identity

A user can access restricted functionality and/or sensitive information that may include administrative functionality and user accounts.

Frequently Asked Questions

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