GHSA-mh6f-8j2x-4483: Event stream Critical Severity Vulnerability That Affects Vulnerability

CRITICAL
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CVSS 9.8
CWE-506
Published
Advisory Summary

GHSA-mh6f-8j2x-4483 is a CRITICAL (CVSS 9.8) critical severity vulnerability that affects vulnerability (CWE-506: Embedded Malicious Code) affecting Event stream libraries in the npm ecosystem. The issue involves critical severity vulnerability that affects event-stream and flatmap-stream. Remediation is available by upgrading affected packages to version 4.0.0.

GHSA-mh6f-8j2x-4483 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-mh6f-8j2x-4483
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-506: Embedded Malicious Code
Affected Product Event stream
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix GHSA-mh6f-8j2x-4483

To remediate this vulnerability, upgrade all affected Event stream dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

event-stream fixed: 4.0.0 
npm install event-stream@4.0.0
flatmap-stream fixed: Latest secure release 
npm install flatmap-stream@Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls event-stream

How to Check if You Are Affected

To determine whether your Node.js application is affected by GHSA-mh6f-8j2x-4483, inspect your project dependencies using npm:

npm ls event-stream

Analyze the terminal output to locate any version of Event stream in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.0.0), your application is affected.

Note: The npm ls event-stream command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-506: Embedded Malicious Code, where the product contains code that appears to be malicious in nature. In Event stream, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

GHSA-mh6f-8j2x-4483 Affected Event stream Versions

2 component(s)
Fixed Versions:
4.0.0
Product / Package Ecosystem Affected Versions Fixed Version
event-stream
npm/event-stream
npm
≥ 3.3.6
< 4.0.0
All 1 versions
3.3.6
4.0.0
flatmap-stream
npm/flatmap-stream
npm

References

Event stream Source Repository REPOSITORY
https://github.com/dominictarr/event-stream/issues/116
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-mh6f-8j2x-4483
Event stream Source Repository REPOSITORY
https://github.com/dominictarr/event-stream

Frequently Asked Questions

What is GHSA-mh6f-8j2x-4483?
GHSA-mh6f-8j2x-4483 is a security vulnerability in Event stream involving Critical severity vulnerability that affects event-stream and flatmap-stream under CWE-506: Embedded Malicious Code.
Which Event stream versions are affected?
Affected versions include releases prior to 4.0.0 across affected packages: event-stream, flatmap-stream.
What version fixes GHSA-mh6f-8j2x-4483?
Upgrading to 4.0.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is event-stream affected?
Yes, event-stream is affected in releases prior to 4.0.0. Upgrade your dependency to 4.0.0 or later.
Is flatmap-stream affected?
Yes, flatmap-stream is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of GHSA-mh6f-8j2x-4483?
GHSA-mh6f-8j2x-4483 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with GHSA-mh6f-8j2x-4483?
GHSA-mh6f-8j2x-4483 is classified under CWE-506: Embedded Malicious Code (The product contains code that appears to be malicious in nature.).
How can I check npm dependencies for GHSA-mh6f-8j2x-4483?
Run the dependency tree command: 'npm ls event-stream'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-mh6f-8j2x-4483",
  "modified" : "2021-09-15T20:08:26Z",
  "published" : "2018-11-26T23:58:21Z",
  "aliases" : [ ],
  "summary" : "Critical severity vulnerability that affects event-stream and flatmap-stream",
  "details" : "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. \n\nUsers of `flatmap-stream` are encouraged to remove the dependency entirely.\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "event-stream"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.3.6"
      }, {
        "fixed" : "4.0.0"
      } ]
    } ],
    "versions" : [ "3.3.6" ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "flatmap-stream"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/dominictarr/event-stream/issues/116"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-mh6f-8j2x-4483"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/dominictarr/event-stream"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-506" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:46:17Z",
    "nvd_published_at" : null
  }
}