jsonwebtoken is a widely used npm package. As of 2026-05-24, there are 4 known vulnerabilities in the OSV database. The latest stable version is 9.0.3. Developers should audit their dependency trees and update to patched versions.
Package Overview
Known Vulnerabilities (4)
| ID | Severity | Score | Affected Versions | Fixed In | Description |
|---|---|---|---|---|---|
| CVE-2015-9235 | CRITICAL | 9.5 | 0 to 4.2.2 | 4.2.2 | Verification Bypass in jsonwebtoken |
| CVE-2022-23539 | HIGH | 7.5 | 0 to 9.0.0 | 9.0.0 | jsonwebtoken unrestricted key type could lead to legacy keys usage |
| CVE-2022-23541 | MODERATE | 5.0 | 0 to 9.0.0 | 9.0.0 | jsonwebtoken's insecure implementation of key retrieval function could lead to Forgeable Public/Private Tokens from RSA to HMAC |
| CVE-2022-23540 | MODERATE | 5.0 | 0 to 9.0.0 | 9.0.0 | jsonwebtoken vulnerable to signature validation bypass due to insecure default algorithm in jwt.verify() |
Security Recommendations
- Pin jsonwebtoken to the latest stable version (9.0.3) in your dependency manifest
- Enable automated dependency updates with Dependabot or Renovate
- Run regular vulnerability scans using
npm audit - Review your lock file (.package-lock.json) after every update
- Monitor the OSV database and NIST NVD for new advisories
FAQ
Is jsonwebtoken safe to use?
jsonwebtoken is actively maintained and widely used. As of 2026-05-24, there are 4 known vulnerabilities listed in the OSV database. Most have patches available. Keeping your dependencies updated and running regular security audits significantly reduces risk.
What vulnerabilities does jsonwebtoken have?
The OSV database currently lists 4 vulnerabilities for jsonwebtoken. These range in severity and are detailed in the vulnerability table above. Check the linked advisories for full technical details and remediation guidance.
How do I update jsonwebtoken to fix vulnerabilities?
Run npm update jsonwebtoken or npm install jsonwebtoken@latest to get the newest version. Use npm audit to identify vulnerable dependencies in your project. Enable automated updates with Dependabot or Renovate to stay current.
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