TI-2026-39197 Aliases CVE-2026-54301 GHSA-v733-mwr6-fgcm

n8n: Same-Origin XSS in Respond to Webhook Node

LOW 30CWE-79Published 2026-06-23 · Updated 2026-06-24

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Passive
Attack complexity: Low
Attack requirements: None
Impact type: Cross-site scripting
Confidentiality · integrity · availability: High · Low · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

n8n is an open source workflow automation platform. Prior to 1.123.55, 2.25.7, and 2.26.2, an authenticated user with workflow edit access could configure a Respond to Webhook node to serve binary content with an attacker-controlled Content-Type. The binary response path bypassed the central Content-Security-Policy sandbox header, allowing a public webhook to execute JavaScript in the n8n origin when visited by an authenticated user, with access to that user's session. This vulnerability is fixed in 1.123.55, 2.25.7, and 2.26.2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00238 14th percentileScored 2026-11-07

Fix Fixed n8n (n8n-io): 1.123.55, 2.25.7, 2.26.2n8n (npm): 1.123.55, 2.26.2, 2.25.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
n8n	n8n	before 1.123.55; 2.0.0-rc.0 to before 2.25.7; 2.26.0 to before 2.26.2	1.123.55, 2.25.7, 2.26.2	Patch available	CNA
—	n8n (npm)	before 1.123.55	1.123.55	Patch available	GHSA-v733-mwr6-fgcm
—	n8n (npm)	2.26.0 to before 2.26.2	2.26.2	Patch available	GHSA-v733-mwr6-fgcm
—	n8n (npm)	2.0.0-rc.0 to before 2.25.7	2.25.7	Patch available	GHSA-v733-mwr6-fgcm

n8n Vendorn8n Affected before 1.123.55; 2.0.0-rc.0 to before 2.25.7; 2.26.0 to before 2.26.2 Fixed in 1.123.55, 2.25.7, 2.26.2 Patch available CNA
n8n (npm) Vendor— Affected before 1.123.55 Fixed in 1.123.55 Patch available GHSA-v733-mwr6-fgcm
n8n (npm) Vendor— Affected 2.26.0 to before 2.26.2 Fixed in 2.26.2 Patch available GHSA-v733-mwr6-fgcm
n8n (npm) Vendor— Affected 2.0.0-rc.0 to before 2.25.7 Fixed in 2.25.7 Patch available GHSA-v733-mwr6-fgcm

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:n8n:n8n::::::node.js::*	before 1.123.55; 2.0.0 to before 2.25.7; 2.26.0 to before 2.26.2	Vulnerable	n8n

cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:* Versions before 1.123.55; 2.0.0 to before 2.25.7; 2.26.0 to before 2.26.2 Vulnerable ·n8n

Remediation

Fix · CNA n8n (n8n-io) Fixed in 1.123.55, 2.25.7, 2.26.2
Fix · GHSA-v733-mwr6-fgcm n8n (npm) Fixed in 1.123.55 Advisory →
Fix · GHSA-v733-mwr6-fgcm n8n (npm) Fixed in 2.26.2 Advisory →
Fix · GHSA-v733-mwr6-fgcm n8n (npm) Fixed in 2.25.7 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-54301
2026-10-03 Alias added: GHSA-v733-mwr6-fgcm

References

Advisory 2

Other 1

https://github.com/n8n-io/n8n

TI-2025-42131 n8n Vulnerable to Remote Code Execution via Expression Injection KEVCVSS 3.1CRITICAL 10.0
TI-2026-17560 n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling CVSS 3.1CRITICAL 10.0
TI-2026-01167 Authenticated users can bypass the Expression sandbox mechanism to achieve full remote… CVSS 3.1CRITICAL 9.9
TI-2026-00644 Sandbox escape in n8n Python task runner allows for arbitrary code execution on the underlying host. CVSS 3.1CRITICAL 9.9
TI-2025-35293 An arbitrary file upload vulnerability in the Chat Trigger component of N8N v1.95.3… CVSS 3.1HIGH 8.8
TI-2023-12275 The n8n package 0.218.0 for Node.js allows Escalation of Privileges. CVSS 3.1HIGH 8.8

See all 178 →

Sources

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