Fastify
npmfastifyFastify is a high-performance Node.js web framework focused on low overhead and plugin extensibility. It uses JSON Schema for request validation and serialization and is commonly used in high-throughput microservices. Fastify's plugin architecture means a single compromised plugin affects all routes in the application.
Checking Fastify
fastify 4.28.0 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=fastify&version=4.28.0" \
-H "Authorization: Bearer YOUR_API_KEY"{
"product": "fastify",
"version": "4.28.0",
"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
Web framework packages handle request lifecycle hooks that run for every request. A backdoored version with access to request hooks can intercept all incoming traffic before any application-level authentication or validation.
Attestd monitors fastify 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.