Bug 2556237 (CVE-2026-112942)

Summary: CVE-2026-112942 launch-editor: launch-editor: Command injection via improper file path validation
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in launch-editor. This vulnerability can allow a remote attacker to achieve arbitrary command execution on Windows systems. By submitting a specially crafted file path containing line and column suffixes, an attacker can bypass file existence checks due to improper path validation. Consequently, this flaw can be leveraged to execute unauthorized operating system commands on the host.
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Description OSIDB Bzimport 2026-10-20 15:06:41 UTC 
launch-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.