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[ CVE-2026-102677 · Published 29 Sep 2026 ]

Electron: Sandboxed preload code cache can be poisoned by a compromised renderer

CVSS 8.8 EPSS <1%Fix available

[ Description ]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.

[ Fixes ]Fixes and patches

  • electron 42.10.0Fixed version · GitHub Advisories · npm package electron: upgrade to 42.10.0 or later (affected >= 42.3.3, < 42.10.0)
  • electron 43.5.0Fixed version · GitHub Advisories · npm package electron: upgrade to 43.5.0 or later (affected >= 43.0.0-beta.1, < 43.5.0)
  • electron 44.0.0-beta.6Fixed version · GitHub Advisories · npm package electron: upgrade to 44.0.0-beta.6 or later (affected >= 44.0.0-alpha.1, < 44.0.0-beta.6)
  • Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
  • Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
  • Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
  • Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ Packages ]Affected open-source packages

[ References ]References