@yes20sh/ts-node-express@1.0.8
Zero-config TypeScript Express backend starter kit
AI Security Review
scanned 11d ago · by lpm-firewall-aiThe postinstall hook causes unrequested writes to the consuming project, including reconstruction of its package.json. The starter-template behavior partially explains the writes, but the automatic detached rewrite leaves a concrete install-time project mutation risk.
Static reason
One or more suspicious static signals were detected.; source matched previously finalized malicious package; routed for review; previous stored version diff introduced dangerous source
Trigger
The package's postinstall lifecycle hook runs during installation.
Impact
Existing project files can be overwritten or omitted from the rewritten manifest without an explicit setup command.
Mechanism
The setup copies starter files and reconstructs the consumer's package.json from selected fields, scripts, and dependencies.
AI rationale
The postinstall hook causes unrequested writes to the consuming project, including reconstruction of its package.json. The starter-template behavior partially explains the writes, but the automatic detached rewrite leaves a concrete install-time project mutation risk.
Evidence
package.jsonscripts/postinstall.jsscripts/delayed-setup.jssrctsconfig.json.env.gitignore.prettierrcREADME.md
Decision evidence
public snapshotAI called this Suspicious at 91.0% confidence as Dangerous Capability with medium false-positive risk.
Evidence for warning
- The npm postinstall hook invokes the setup script for the consuming project.
- The hook launches a detached setup process intended to rewrite the consumer's package.json after npm finishes.
- Setup copies project files and rewrites package.json, retaining some scripts and dependencies but rebuilding the manifest from selected fields.
Evidence against
- The setup has a starter-project scaffolding effect: it adds src only when that directory is absent and merges default scripts and dependencies with existing values.
Behavioral surface
ChildProcessEnvironmentVarsFilesystem
HighEntropyStrings
Source & flagged code
6 flagged · loading sourcepackage.jsonView file
•scripts.postinstall = node scripts/postinstall.js
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg•scripts.postinstall = node scripts/postinstall.js
Medium
Ambiguous Install Lifecycle Script
Install-time lifecycle script is not statically allowlisted and needs review.
package.jsonView on unpkg9"scripts": {
"build": "tsc",
"prepublishOnly": "npm run build",
"postinstall": "node scripts/postinstall.js",
"start": "node dist/server.
Medium
Suspicious Lifecycle Evidence
The npm postinstall hook invokes the setup script for the consuming project.
package.jsonView on unpkg · L9scripts/postinstall.jsView file
Findings
3 High5 Medium4 Low
HighInstall Time Lifecycle Scriptspackage.json
HighKnown Malware Source Similarityscripts/postinstall.js
HighPrevious Version Dangerous Deltascripts/postinstall.js
MediumAmbiguous Install Lifecycle Scriptpackage.json
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
MediumSuspicious Lifecycle Evidencepackage.json
MediumSuspicious Lifecycle Evidencescripts/postinstall.js
LowNon Install Lifecycle Scripts
LowScripts Present
LowFilesystem
LowHigh Entropy Strings
Affected versions and remediation
This report applies to @yes20sh/ts-node-express@1.0.8.
See all versions of @yes20sh/ts-node-express for other recorded verdicts.
- Review the evidence and your use of @yes20sh/ts-node-express@1.0.8 before allowing it. Restrict the permissions described in this report.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
Evidence last updated: .
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