fkie_cve-2026-102677

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.

GHSA-qmv3-fv6v-rmhq — Electron: Sandboxed preload code cache can be poisoned by a compromised renderer

Affected: npm: electron

### Impact

The cache Electron keeps for sandboxed preload scripts did not verify that a cached entry matched the preload it was served for. A compromised renderer could use this to run its own code in the preload context on a later load.

Apps are only affected if they load untrusted content. Apps that do not load untrusted content are not affected.

### Workarounds

There are no app side workarounds, you must update to a patched version of Electron.

### Fixed Versions

* `44.0.0-beta.6` * `43.5.0 ` * `42.10.0`

### For more information

If you have any questions or comments about this advisory, email us at [security@electronjs.org](mailto:security@electronjs.org)

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fkie_cve-2026-102677

GHSA-qmv3-fv6v-rmhq — Electron: Sandboxed preload code cache can be poisoned by a compromised renderer