CVE-2026-54052: n8n-mcp before 2.56.1 (exclusive), < 2.56.1

CVE-2026-54052. CVSS 3.1 base score 9.9 (CRITICAL, NVD). EPSS 0.00388 (percentile 0.31788), scored 24-Oct-2026.

Affected technology

n8n-mcp · before 2.56.1 (exclusive)
n8n-mcp

n8n-mcp · < 2.56.1
czlonkowski

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · Low privileges required · No user interaction required

Attack conditions (NVD, CVSS 3.1): Network (remote) · Low privileges required · No user interaction required

What an attacker can do

Vendor/CNA’s CVSS 3.1 assessment (base score 9.9/10) rates confidentiality and integrity impact as high; availability impact as low. NVD’s CVSS 3.1 assessment (base score 9.9/10) rates confidentiality and integrity impact as high; availability impact as low. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 25-Oct-2026 01:29 UTC

CWE: CWE-639, CWE-862
CCR priority: 39.7 /100 (P4)
CVSS 3.1: 9.9 /10 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L · NVD
EPSS: 0.00388 · percentile 0.31788 · 2026-10-24
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-25 01:28:19.133527+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-54052.html