Security Flaw in n8n Workflow Automation Platform Exposes Users to Attack
CVE-2026-54301

7HIGH

Key Information:

Vendor

N8n-io

Status
N8n
Vendor
CVE Published:
23 June 2026

What is CVE-2026-54301?

The n8n workflow automation platform has a vulnerability that allows an authenticated user with workflow edit access to configure a Respond to Webhook node in a way that it can serve binary content with a maliciously crafted Content-Type. This configuration bypasses the Content-Security-Policy sandbox header, enabling a public webhook to execute JavaScript within the n8n origin. This can occur when an authenticated user accesses the webhook, potentially exposing the user's session to external threats. The issue has been addressed in versions 1.123.55, 2.25.7, and 2.26.2.

Affected Version(s)

n8n < 1.123.55 < 1.123.55

n8n >= 2.0.0-rc.0, < 2.25.7 < 2.0.0-rc.0, 2.25.7

n8n >= 2.26.0, < 2.26.2 < 2.26.0, 2.26.2

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-v7...
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CVSS V4

Score:
7
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.