Electron up to 42.3.2 buffer overflow

Summaryinfo

A vulnerability was found in Electron up to 42.3.2. It has been declared as critical. This issue affects some unknown processing. Executing a manipulation can lead to buffer overflow. This vulnerability is handled as CVE-2026-54257. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Electron up to 42.3.2 and classified as critical. This vulnerability affects some unknown processing. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-54257 since 06/12/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

Upgrading to version 42.3.3 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• Electron

Version

• 42.3.0
• 42.3.1
• 42.3.2

Website

• Product: https://github.com/electron/electron/

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Once again VulDB remains the best source for vulnerability data.

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