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Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

CVE-2026-42232

High
9.4/10

Summary

n8n is an open source workflow automation platform. Prior to version 1.123.32, 2.x prior to 2.17.4, and 2.18.x prior to 2.18.1, an authenticated user with permission to create or modify workflows could achieve global Prototype Pollution via the XML Node leading to Remote Code Execution (RCE) when combined with other nodes exploiting the Prototype Pollution.

  • LOW
  • NETWORK
  • HIGH
  • UNCHANGED
  • NONE
  • LOW
  • HIGH
  • HIGH

CWE-1321 - Prototype Pollution

Prototype pollution is one of the lesser-known vulnerabilities. It allows attackers to abuse the rules of JavaScript by injecting properties into the general object “Object” in JS. Modifying the prototype of “Object” affects the behavior of all objects in the entire app, potentially resulting in denial of service, arbitrary code execution, cross-site scripting, etc.

References

Advisory Timeline

  • Published