jsonwebtoken
npmjsonwebtokenjsonwebtoken is the most widely used Node.js library for creating and verifying JSON Web Tokens. It signs tokens using HMAC secrets or RSA/EC private keys and verifies them with the corresponding secret or public key. Most Node.js REST APIs use this package to issue and validate session tokens.
Checking jsonwebtoken
jsonwebtoken 9.0.2 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=jsonwebtoken&version=9.0.2" \
-H "Authorization: Bearer YOUR_API_KEY"{
"product": "jsonwebtoken",
"version": "9.0.2",
"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
JWT libraries handle signing secrets and private keys directly. A backdoored version can exfiltrate the signing secret, allowing an attacker to forge arbitrary valid tokens for any user in the system without additional access.
Attestd monitors jsonwebtoken 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.