Fix CVE-2022-23540 in jsonwebtoken HIGH

Fix CVE-2022-23540 (algorithm confusion attack) in jsonwebtoken for npm. Paste your package.json into PackageFix and get a patched version back — no CLI, no signup.

⚠ Vulnerability

CVE-2022-23540 — algorithm confusion attack in jsonwebtoken. Update to 9.0.0 or later.

Vulnerable Version — package.json

"jsonwebtoken": "8.5.1"

Fixed Version — package.json

"jsonwebtoken": "9.0.0"

✓ Fix

Update to 9.0.0 and run npm install to apply the fix.

Scan your dependencies now — paste your manifest, get a fixed version back in seconds.

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Frequently Asked Questions

What is CVE-2022-23540?

CVE-2022-23540 is a vulnerability in jsonwebtoken that allows algorithm confusion attack. Update to version 9.0.0 or later to fix it.

Is CVE-2022-23540 on the CISA KEV catalog?

Check the live CISA KEV catalog at packagefix.dev — the catalog updates daily and PackageFix always reflects the current status.

How do I fix CVE-2022-23540 in jsonwebtoken?

Update jsonwebtoken to version 9.0.0 or later in your package.json. Run npm install after updating.

Does CVE-2022-23540 affect all versions of jsonwebtoken?

Check the OSV advisory for the exact affected version range. PackageFix shows the minimum safe version for your installed version.