npm package report

Is event-stream safe?

Confirmed malicious. Do not install it, and remove it where it has been installed.

Do not install this package

CRITICALanalyst verified

Cryptocurrency Wallet Stealer, part of the Event-Stream Cryptocurrency Theft 2018 campaign. Confirmed 2018-11-26, verified by a CyberXYZ analyst.

// what we observed

New maintainer right9ctrl injected flatmap-stream@0.1.1 to steal Copay Bitcoin wallet credentials. One of the most impactful npm supply chain attacks.

target: Copay Bitcoin wallet
attack vector: dependency_injection
compromised account: right9ctrl
malicious dependency: flatmap-stream@0.1.1

// versions and what to do

Malicious: 3.3.6
Clean: 3.3.4, 4.0.1

Remove event-stream@3.3.6 immediately. Audit all transitive deps. Check for flatmap-stream@0.1.1. Rotate credentials if Copay was used.

npm uninstall event-stream

// reach

0 direct dependencies

none carry a known advisory

45 packages depend on it

an advisory here reaches each of them

Create a free accountfor every dependency path, dependent and what to upgrade

// ai model usage

Tracked for PyPI packages. HuggingFace models declare Python dependencies, so npm packages are not covered.

cvss

0.0

critical

severity band, no base score published

epss

not scored

chance of exploitation in 30 days

xyz score

0.0

medium

CyberXYZ composite out of 10

fig. 01 — GHSA-mh6f-8j2x-4483, the advisory selected below

// 1 advisories

GHSA-mh6f-8j2x-4483

CRITICAL

The NPM package flatmap-stream is considered malicious. A malicious actor added this package as a dependency to the NPM event-stream package in version 3.3.6. Users of event-stream are encouraged to downgrade to the last non-malicious version, 3.3.4, or upgrade to the latest 4.x version.

Users of flatmap-stream are encouraged to remove the dependency entirely.

// cvss v3.1 vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Checked 2026-10-09 at 10:25 UTC. The most recent advisory here was published 2018-11-26. Updated continuously from NVD, GHSA, OSV and CNA feeds.