Fix CVE-2020-8203 in Lodash HIGH

Fix CVE-2020-8203 (prototype pollution) in Lodash for npm. Paste your package.json into PackageFix and get a patched version back — no CLI, no signup.

⚠ Vulnerability

CVE-2020-8203 — prototype pollution in Lodash. Update to 4.17.21 or later.

Vulnerable Version — package.json

"lodash": "4.17.15"

Fixed Version — package.json

"lodash": "4.17.21"

✓ Fix

Update to 4.17.21 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-2020-8203?

CVE-2020-8203 is a vulnerability in Lodash that allows prototype pollution. Update to version 4.17.21 or later to fix it.

Is CVE-2020-8203 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-2020-8203 in Lodash?

Update Lodash to version 4.17.21 or later in your package.json. Run npm install after updating.

Does CVE-2020-8203 affect all versions of Lodash?

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