CVE-2026-54301 n8n: Same-Origin XSS in Respond to Webhook Node
Authenticated users can inject JavaScript via webhook responses, enabling session hijacking and code execution in the n8n origin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-54301?
CVE-2026-54301 is a high-severity cross-site scripting vulnerability in N8n N8n, published on 23 Jun 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-54301?
6 open source packages ship an affected version, including n8n. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
n8n npm | All versions | 1.123.55 |
n8n npm | All versions | 1.123.55 |
n8n npm | From 2.0.0-rc.0 | 2.25.7 |
n8n npm | From 2.0.0-rc.0 | 2.25.7 |
n8n npm | From 2.26.0 | 2.26.2 |
n8n npm | From 2.26.0 | 2.26.2 |
Products include N8n N8n.
How do I fix CVE-2026-54301?
Upgrade n8n to a fixed version for your release line: 1.123.55, 2.25.7 or 2.26.2.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-54301 being exploited?
There is no known exploitation of CVE-2026-54301 in the wild and no public exploit code.
Other vulnerabilities in N8n N8n
- CVE-2025-68613 n8n Improper Control of Dynamically-Managed Code Resources
- CVE-2026-21877 n8n is vulnerable to Remote Code Execution via Arbitrary File Write
- CVE-2026-21858 n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling
- CVE-2026-1470 n8n Unsafe Workflow Expression Evaluation Allows Remote Code Execution
- CVE-2025-68668 n8n Vulnerable to Arbitrary Command Execution in Pyodide based Python Code Node
Sources
Also known as GHSA-v733-mwr6-fgcm, MINI-hhf9-42wc-2657, ROOT-APP-NPM-CVE-2026-54301.