import-in-the-middle has unsanitized user controlled input in module generation
Impact
The import-in-the-middle loader works by generating a wrapper module on the fly. The wrapper uses the module specifier to load the original module and add some wrapping code. It allows for remote code execution in cases where an application passes user-supplied input directly to an import() function.
Patches
This vulnerability has been patched in import-in-the-middle version 1.4.2
Workarounds
- Do not pass any user-supplied input to
import(). Instead, verify it against a set of allowed values. - If using
import-in-the-middleand support for EcmaScript Modules is not needed, ensure that none of the following options are set (either via command-line or theNODE_OPTIONSenvironment variable):
--loader=import-in-the-middle/hook.mjs
--loader import-in-the-middle/hook.mjsReferences
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Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | import-in-the-middle | < 1.4.2 | 1.4.2 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:L- Weakness (CWE)
CWE-20- Platform
- npm
- Package
import-in-the-middle- Disclosed
- 08.08.2023
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-5r27-rw8r-7967 - CC BY 4.0
Vulnerability history: import-in-the-middle
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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