Helmet

registrynpm

package namehelmet

maintainerHelmet Contributors

Helmet is an Express middleware that sets security-related HTTP response headers (Content-Security-Policy, HSTS, X-Frame-Options, and others). It is used to harden Express applications against common web vulnerabilities. It runs as middleware on every response.

api usage

Checking Helmet

helmet 8.0.0 is a clean version with no known supply chain compromise. The response returns compromised: false with an empty sources array.

bash

curl "https://api.attestd.io/v1/check?product=helmet&version=8.0.0" \
  -H "Authorization: Bearer YOUR_API_KEY"

json

{
  "product": "helmet",
  "version": "8.0.0",
  "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"
}

attack surface

Why this package is monitored

Security header middleware packages are trusted to enforce CSP and other browser security policies. A backdoored version can silently weaken CSP to allow external script execution or remove HSTS, opening the application to downgrade attacks.

Attestd monitors helmet using the following detection sources:

registry

Manually curated advisories in the Attestd registry, verified by a human analyst. Confidence 1.0.

osv

OSV.dev malicious-package advisories with IDs prefixed MAL-. Confidence 0.95.

npm_deprecation

npm package versions with deprecation messages containing targeted attack language such as malicious, backdoor, or compromised. Confidence 0.80.

Supply chain overview All npm packages Express Passport.js Response fields