npm package
jsonwebtoken 4.2.2 vulnerabilities, and the version that fixes all of them
jsonwebtoken 4.2.2 has 3 known vulnerabilities (1 rated high or critical); 9.0.0 fixes all of them. The maintainers deprecated this release.
npm (opens in a new tab) describes it as “JSON Web Token implementation (symmetric and asymmetric)”
- Known vulnerabilities
- 3
- 1 rated high or critical
- Released
- Mar 26, 2015
- Latest is 9.0.3
- Downloads last week
- 274
- Under 1% of jsonwebtoken downloads
- Licence
- MIT
- Pulls in
- 24 packages
- Resolved by deps.dev
- Status
- Deprecated release
What to upgrade to
9.0.0 is the closest release with no known vulnerabilities.
9.0.0Upgrade to this
Fixes all 3 known vulnerabilities. Released Dec 21, 2022.
No known vulnerabilitiesLatest release. Released Dec 4, 2025.
No known vulnerabilities
Hand the fix to your coding agent
One task with the upgrade, the file to change and why. Paste it into Claude Code, Cursor or Codex.
Findings
- CriticalVulnerability
3 known vulnerabilities in jsonwebtoken 4.2.2
EPSS: top 46%1 rated high or critical. Most serious: CVE-2022-23539, jsonwebtoken unrestricted key type could lead to legacy keys usage . Upgrading to 9.0.0 fixes all of them.
- WarningOutdated
jsonwebtoken 4.2.2 is 5 major versions behind
Latest release is 9.0.3. The maintainers deprecated 4.2.2: "Critical vulnerability fix in v5.0.0. See https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/"
Every advisory for jsonwebtoken 4.2.2
Known exploited first (CISA KEV), then by how likely they are to be exploited (FIRST EPSS), then by severity. Each id links to its OSV.dev record.
WarningCVE-2022-23541 on OSV.dev (opens in a new tab)GHSA-hjrf-2m68-5959EPSS: top 46%
jsonwebtoken's insecure implementation of key retrieval function could lead to Forgeable Public/Private Tokens from RSA to HMAC
Fixed in 9.0.0. Published Dec 22, 2022.
WarningCVE-2022-23540 on OSV.dev (opens in a new tab)GHSA-qwph-4952-7xr6EPSS: top 56%
jsonwebtoken vulnerable to signature validation bypass due to insecure default algorithm in jwt.verify()
Fixed in 9.0.0. Published Dec 22, 2022.
CriticalCVE-2022-23539 on OSV.dev (opens in a new tab)GHSA-8cf7-32gw-wr33EPSS: top 59%
jsonwebtoken unrestricted key type could lead to legacy keys usage
Fixed in 9.0.0. Published Dec 22, 2022.
Who is still on a vulnerable jsonwebtoken
6% of last week’s 60.4M jsonwebtoken downloads went to versions with known vulnerabilities.
From npm’s per-version download counts for the last 7 days, each version checked against OSV.dev. The versions checked cover over 99% of downloads.
Is jsonwebtoken the only one?
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How this page is checked
StackPrism asks OSV.dev which advisories affect exactly jsonwebtoken 4.2.2, merges duplicates filed under several ids, and ranks them with CISA’s Known Exploited Vulnerabilities list and FIRST EPSS. Release dates and deprecation come from deps.dev and npm. No AI writes this page: every sentence comes from that data, refreshed every few hours.
Last checked against npm, OSV.dev, deps.dev, CISA KEV and FIRST EPSS.