TI-2024-18141 Aliases CVE-2024-27303 GHSA-r4pf-3v7r-hh55

electron-builder's NSIS installer - execute arbitrary code on the target machine (Windows only)

LOW 34CWE-426Published 2024-03-06 · Updated 2024-08-13

Key facts

Attack vector: Local
Privileges required: Low
User interaction: Required
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-426.

Summary

electron-builder is a solution to package and build a ready for distribution Electron, Proton Native app for macOS, Windows and Linux. A vulnerability that only affects eletron-builder prior to 24.13.2 in Windows, the NSIS installer makes a system call to open cmd.exe via NSExec in the `.nsh` installer script. NSExec by default searches the current directory of where the installer is located before searching `PATH`. This means that if an attacker can place a malicious executable file named cmd.exe in the same folder as the installer, the installer will run the malicious file. Version 24.13.2 fixes this issue. No known workaround exists. The code executes at the installer-level before the app is present on the system, so there's no way to check if it exists in a current installer.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00282 20th percentileScored 2026-11-07

Fix Fixed electron-builder (electron-userland): 24.13.2app-builder-lib (npm): 24.13.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
electron	electron-builder	before 24.13.2	24.13.2	Patch available	CNA
—	app-builder-lib (npm)	before 24.13.2	24.13.2	Patch available	GHSA-r4pf-3v7r-hh55

electron-builder Vendorelectron Affected before 24.13.2 Fixed in 24.13.2 Patch available CNA
app-builder-lib (npm) Vendor— Affected before 24.13.2 Fixed in 24.13.2 Patch available GHSA-r4pf-3v7r-hh55

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:electron:electron-builder::::::node.js::*	before 24.13.2	Vulnerable	electron
cpe:2.3:o:microsoft:windows:-:::::::*	not specified by NVD	Running on	Microsoft

cpe:2.3:a:electron:electron-builder:*:*:*:*:*:node.js:*:* Versions before 24.13.2 Vulnerable ·electron
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

Fix · CNA electron-builder (electron-userland) Fixed in 24.13.2
Fix · GHSA-r4pf-3v7r-hh55 app-builder-lib (npm) Fixed in 24.13.2 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2024-27303
2026-10-03 Alias added: GHSA-r4pf-3v7r-hh55

References

Patch 1

https://github.com/electron-userland/electron-builder/commit/8f4acff3c2d45c1cb07779bb3fe79644408ee387

Advisory 2

Other 2

TI-2026-39496 Information disclosure in electron-builder CVSS 4.0HIGH 8.2
TI-2024-26621 Code Signing Bypass on Windows in electron-updater < 6.3.0-alpha.6 CVSS 3.1HIGH 7.5
TI-2026-39495 electron-updater: Uncontrolled search path elements within `AppImage` built by `app-builder-lib` CVSS 3.1HIGH 7.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences