Improper Input Validation Affecting n8n package, versions <2.28.3-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.37% (30th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-N8N-17741576
  • published1 Jul 2026
  • disclosed22 Jun 2026

Introduced: 22 Jun 2026

CVE-2026-55602  (opens in a new tab)
CWE-20  (opens in a new tab)
CWE-187  (opens in a new tab)

How to fix?

Upgrade Minimos:latest n8n to version 2.28.3-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.

http-proxy-middleware is node.js http-proxy middleware. From 0.16.0 until 2.0.10, 3.0.6, and 4.1.0, http-proxy-middleware documents router proxy-table entries as host, path, or host+path selectors, but the host+path implementation uses unanchored substring matching on attacker-controlled request metadata. As a result, a crafted Host header that is only a superstring match for a configured host+path key can still route a request to an unintended backend. This vulnerability is fixed in 2.0.10, 3.0.6, and 4.1.0.

CVSS Base Scores

version 3.1