CVE-2026-54257
NoneCVSS
—
EPSS
0.4%
Published
Jun 23, 2026
CISA due date
—
The record
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. From 42.3.1 until 42.3.3, Buffer performs incorrect byte length calculations resulting in heap buffer under/overflow. Most apps will crash and some may perform incorrect buffer allocations in the Node.js Buffer API resulting in unexpected truncation or allocation. This vulnerability is fixed in 42.3.3.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | electron | 42.3.1 | 42.3.3 |
Related vulnerabilities
- GHSA-q6m5-f73j-m9mc Electron: Buffer performs incorrect byte length calculations resulting in heap buffer… Same vulnerability
- CVE-2026-34781 Electron is a framework for writing cross-platform desktop applications using JavaScript… Also affects electron
- CVE-2026-34765 Electron is a framework for writing cross-platform desktop applications using JavaScript… Also affects electron
- GHSA-f37v-82c4-4x64 Electron: Crash in clipboard.readImage() on malformed clipboard image data Also affects electron
- GHSA-f3pv-wv63-48x8 Electron: Named window.open targets not scoped to the opener's browsing context Also affects electron
- CVE-2026-34764 Electron is a framework for writing cross-platform desktop applications using JavaScript… Also affects electron
- CVE-2026-34780 Electron is a framework for writing cross-platform desktop applications using JavaScript… Also affects electron
- CVE-2026-34778 Electron is a framework for writing cross-platform desktop applications using JavaScript… Also affects electron