PT-2026-56815 · N8N+1 · N8N

Published 2026-07-09 · Updated 2026-07-09 · CVE-2026-59206

Mitre

CVSS v4.0

7.1

High

Base vector

AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N

n8n is an open source workflow automation platform. Prior to 1.123.61, 2.27.4, and, 2.28.1, an authenticated user with the default workflow:create permission could pollute Object.prototype through a crafted workflow saved, updated, or imported via the workflow API, allowing unauthenticated requests to be treated as a privileged user and exposing user and project listing endpoints. This issue is fixed in versions 1.123.61, 2.27.4, and 2.28.1.

Fix

Prototype Pollution

Weakness Enumeration

CWE-1321

Related Identifiers

CVE-2026-59206

Affected Products

N8N

References · 4

• https://github.com/n8n-io/n8n/security/advisories/GHSA-75qm-gp28-rcq9 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-59206 · Security Note
• https://github.com/n8n-io/n8n/releases/tag/n8n%402.28.1 · Note
• https://github.com/n8n-io/n8n/releases/tag/n8n%402.27.4 · Note