launch-editor: `fs.existsSync()` existence check can be bypassed on Windows

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-112942
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-20 15:17:17 UTC
Updated2026-10-20 19:55:49 UTC
Descriptionlaunch-editor allows users to open files with line numbers in editor from Node.js. Prior to 2.14.2, launch-editor-middleware processes an attacker-controlled Windows file argument where the file argument ends in a parent-directory component plus a line-and-column suffix: the path is resolved while the suffix is still present, and launch-editor removes the suffix before its existsSync check, leaving the existing parent directory for existsSync and allowing the attacker-controlled file argument to pass filename existence validation without requiring the malicious filename to exist. The bypass can lead to OS command injection when combined with the separately described Windows percent-expansion flaw. This issue is fixed in version 2.14.2.

Risk And Classification

Primary CVSS: v4.0 7.5 HIGH from [email protected]

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Problem Types: CWE-77 | CWE-77 CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary7.5HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/C...
4.0CNADECLARED7.5HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
None
User Interaction
Active
Confidentiality
High
Integrity
High
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Vitejs Launch-editor affected < 2.14.2 Not specified
CNA Vitejs Vite affected >= 8.3.0, < 8.3.3 Not specified
CNA Vitejs Vite affected >= 8.2.0, < 8.2.4 Not specified
CNA Vitejs Vite affected >= 8.0.0, < 8.1.6 Not specified
CNA Vitejs Vite affected >= 7.0.0, < 7.3.7 Not specified
CNA Vitejs Vite affected < 6.4.4 Not specified
CNA Vitejs Vite-plus affected < 1.1.0 Not specified

References

ReferenceSourceLinkTags
github.com/vitejs/launch-editor/security/advisories/GHSA-587h-7wmj-h5pm [email protected] github.com
github.com/vitejs/launch-editor/commit/f13cd835d4b8e860b1d4d080ad8a490cc... [email protected] github.com
github.com/vitejs/launch-editor/releases/tag/v2.14.2 [email protected] github.com
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