undici
npmundiciundici is the official HTTP/1.1 client for Node.js, developed by the Node.js Core team and used as the underlying transport for the built-in `fetch` in Node.js 18+. It is a dependency of several high-traffic npm packages and is the canonical low-level HTTP implementation for the Node.js runtime.
Checking undici
undici 6.19.0 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=undici&version=6.19.0" \
-H "Authorization: Bearer YOUR_API_KEY"{
"product": "undici",
"version": "6.19.0",
"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
Low-level HTTP transports that implement the built-in fetch behavior are trusted implicitly by higher-level HTTP clients. A compromised undici could affect all packages that delegate to Node.js's built-in fetch, including LLM SDK packages.
Attestd monitors undici 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.