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Vulnerability · Published Sep 29, 2026 · Assigned by GitHub_M

CVE-2026-102677Electron: Sandboxed preload code cache can be poisoned by a compromised renderer

High 7.8

In plain English

A high-severity improper input validation in electron from electron. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)<0.1%top 99.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. From 42.3.3 until 42.10.0, 43.5.0, and 44.0.0-beta.6, Electron's sandboxed preload code cache did not verify that a cached entry matched the preload it was served for. A compromised renderer could write attacker-controlled cache data and cause Electron to reuse it for a later load, executing the renderer's code in the more privileged preload context. The issue affects applications that load untrusted content. This issue is fixed in versions 42.10.0, 43.5.0, and 44.0.0-beta.6.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
npmelectron42.10.0GHSA-qmv3-fv6v-rmhq
npmelectron43.5.0GHSA-qmv3-fv6v-rmhq
npmelectron44.0.0-beta.6GHSA-qmv3-fv6v-rmhq

Affected products (as reported)

VendorProductVersions
electron electron >= 42.3.3, < 42.10.0>= 43.0.0-beta.1, < 43.5.0>= 44.0.0-alpha.1, < 44.0.0-beta.6

Weakness: CWE-20, CWE-345 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

References