Critical severityGHSA Advisory· Published Jun 23, 2026· Updated Jun 25, 2026
CVE-2026-54257
CVE-2026-54257
Description
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
electronnpm | >= 42.3.1, < 42.3.3 | 42.3.3 |
Affected products
2- Range: >= 42.3.1, < 42.3.3
Patches
Vulnerability mechanics
References
3News mentions
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