Type Confusion Affecting @babel/plugin-transform-modules-systemjs package, versions >=7.12.0 <7.29.4>=8.0.0-alpha.0
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Test your applications- Snyk IDSNYK-JS-BABELPLUGINTRANSFORMMODULESSYSTEMJS-16624576
- published10 May 2026
- disclosed8 May 2026
- creditDaniel Cervera
Introduced: 8 May 2026
NewCVE-2026-44728 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Type Confusion in code compilation. An attacker can execute arbitrary code by providing malicious input.
Notes: This is only exploitable if the system compiles untrusted or attacker-controlled code.
Workaround
This vulnerability can be mitigated by pinning @babel/parser to version 7.11.5 or by avoiding the use of the modules: "systemjs" option when used through @babel/preset-env.