TypeScript
npmtypescriptTypeScript is the typed superset of JavaScript developed by Microsoft, compiled to plain JavaScript before execution. It is installed as a dev dependency in virtually every modern JavaScript project. The TypeScript compiler reads all source files in the project as part of type checking.
Checking TypeScript
typescript 5.5.0 is a clean version with no known supply chain compromise. The response returns compromised: false with an empty sources array.
curl "https://api.attestd.io/v1/check?product=typescript&version=5.5.0" \
-H "Authorization: Bearer YOUR_API_KEY"{
"product": "typescript",
"version": "5.5.0",
"supported": true,
"risk_state": "none",
"supply_chain": {
"compromised": false,
"sources": [],
"malware_type": null,
"description": null,
"advisory_url": null,
"compromised_at": null,
"removed_at": null
},
"last_updated": "2026-05-01T00:00:00Z"
}Why this package is monitored
The TypeScript compiler reads all project source files during type checking and compilation. A compromised compiler binary can exfiltrate source code or inject code into compiled output files, affecting the production bundle.
Attestd monitors typescript using the following detection sources:
registryManually curated advisories in the Attestd registry, verified by a human analyst. Confidence 1.0.
osvOSV.dev malicious-package advisories with IDs prefixed MAL-. Confidence 0.95.
npm_deprecationnpm package versions with deprecation messages containing targeted attack language such as malicious, backdoor, or compromised. Confidence 0.80.