CVE-2026-54257 — Electron: Buffer performs incorrect byte length calculations resulting in heap buffer under/overflow

CVE-2026-54257

Electron: Buffer performs incorrect byte length calculations resulting in heap buffer under/overflow PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
electron / electron	affected >= 42.3.1, < 42.3.3

CWE

CWE-120

References

https://github.com/electron/electron/security/advisories/GHSA-q6m5-f73j-m9mc

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.