CVE-2019-19771: The lodahs package 0.0.1 for Node.js is a Trojan horse, and may have been installed by persons who mistyped th

Q: How do I fix CVE-2019-19771?

lodahs: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2019-19771 being exploited?

CVE-2019-19771 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-19771 affect?

CVE-2019-19771 affects lodahs. Severity is high (CVSS 8.8). The lodahs package 0.0.1 for Node.js is a Trojan horse, and may have been installed by persons who mistyped the lodash package name. In particular, the Trojan horse finds and exfiltrates cryptocurrency wallets.

This month

HIGH 8.8DOWNGRADE

CVE-2019-19771 is a high-severity flaw (CVSS 8.8) affecting lodahs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The lodahs package 0.0.1 for Node.js is a Trojan horse, and may have been installed by persons who mistyped the lodash package name. In particular, the Trojan horse finds and exfiltrates cryptocurrency wallets.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.3% (top 30%)
CISA exploited list	No
Published	2019-12-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: lodahs project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-12-12 20:15 UTCPublished CVE record published
2026-06-17 02:27 UTCUpdated Record last modified

lodahs project lodahs DOWNGRADE

Affected: 1.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.0

1. Check installed version

npm ls lodahs

2. No fixed release: DOWNGRADE to a release before 1.0.0

npm view lodahs versions npm install lodahs@"<1.0.0"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-19771?

lodahs: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-19771 being exploited?

CVE-2019-19771 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-19771 affect?

CVE-2019-19771 affects lodahs. Severity is high (CVSS 8.8). The lodahs package 0.0.1 for Node.js is a Trojan horse, and may have been installed by persons who mistyped the lodash package name. In particular, the Trojan horse finds and exfiltrates cryptocurrency wallets.

How urgent is CVE-2019-19771?

Priority 48/100. High severity

Software pages

Node.js vulnerabilities · Lodash vulnerabilities

References

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