| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-537j-gqpc-p7fq | n8n Vulnerable to XSS via MCP OAuth client |
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Wed, 06 May 2026 18:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:n8n:n8n:*:*:*:*:enterprise:node.js:*:* cpe:2.3:a:n8n:n8n:2.18.0:*:*:*:enterprise:node.js:*:* |
|
| Metrics |
cvssV3_1
|
Tue, 05 May 2026 22:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
N8n
N8n n8n |
|
| Vendors & Products |
N8n
N8n n8n |
Tue, 05 May 2026 15:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Mon, 04 May 2026 19:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, an unauthenticated attacker could register a malicious MCP OAuth client with a crafted client_name. If a victim user authorized the OAuth consent dialog and a second user subsequently revoked that access, a toast notification would render the injected script. Clicking the link would execute arbitrary JavaScript in the victim's authenticated n8n browser session, enabling credential and session token theft, workflow manipulation, or privilege escalation. This issue has been patched in versions 1.123.32, 2.17.4, and 2.18.1. | |
| Title | n8n: XSS via MCP OAuth client | |
| Weaknesses | CWE-79 CWE-87 |
|
| References |
| |
| Metrics |
cvssV4_0
|
Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-05-05T14:40:22.889Z
Reserved: 2026-04-25T05:37:12.117Z
Link: CVE-2026-42235
Updated: 2026-05-05T14:40:16.191Z
Status : Analyzed
Published: 2026-05-04T19:16:06.173
Modified: 2026-05-06T18:05:44.303
Link: CVE-2026-42235
No data.
OpenCVE Enrichment
Updated: 2026-05-05T21:45:15Z
Github GHSA