Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') Affecting n8n package, versions <2.22.6-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.26% (18th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-MINIMOSLATEST-N8N-17134369
  • published3 Jun 2026
  • disclosed13 May 2026

Introduced: 13 May 2026

CVE-2026-44292  (opens in a new tab)
CWE-1321  (opens in a new tab)

How to fix?

Upgrade Minimos:latest n8n to version 2.22.6-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream n8n package and not the n8n package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs generated message constructors copied enumerable properties from a provided properties object without filtering the proto key. If an application constructed a message from an attacker-controlled plain object, an own enumerable proto property could alter the prototype of that individual message instance. This vulnerability is fixed in 7.5.6 and 8.0.2.

CVSS Base Scores

version 3.1