RCE in N8n
CVE-2026-27495
n8n is an open source workflow automation platform. Prior to versions 2.10.1, 2.9.3, and 1.123.22, an authenticated user with permission to create or modify workflows could exploit a vulnerability in the JavaScript Task Runner sandbox to execute arbitrary code outside the sandbox boundary. On instances using internal Task Runners (default runner mode), this could result in full compromise of the n8n host. On instances using external Task Runners, the attacker might gain access to or impact other task executed on the Task Runner. Task Runners must be enabled using `N8N_RUNNERS_ENABLED=true`. The issue has been fixed in n8n versions 2.10.1, 2.9.3, and 1.123.22. Users should upgrade to one of these versions or later to remediate the vulnerability. If upgrading is not immediately possible, administrators should consider the following temporary mitigations. Limit workflow creation and editing permissions to fully trusted users only, and/or use external runner mode (`N8N_RUNNERS_MODE=external`) to limit the blast radius. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (55.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.008 · change: +0.001
Affected products
- N8n
- N8n-Io N8n — versions < 1.123.22, >= 2.0.0, < 2.9.3, >= 2.10.0, < 2.10.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/n8n-io/n8n/security/advisories/GHSA-jjpj-p2wh-qf23 (Vendor Advisory)
- docs.n8n.io/hosting/configuration/task-runners (Product)
- github.com/n8n-io/n8n/releases/tag/n8n@1.123.22 (Release Notes)
- github.com/n8n-io/n8n/releases/tag/n8n@2.10.1 (Release Notes)
- github.com/n8n-io/n8n/releases/tag/n8n@2.9.3 (Release Notes)
Frequently asked questions
- What is CVE-2026-27495?
- CVE-2026-27495 is a critical-severity vulnerability in N8n, classified under Code Injection. CVSS score: 9.9/10. Published 2026-02-25.
- How severe is CVE-2026-27495?
- Critical severity. CVSS v3 base score is 9.9 out of 10.
- Is CVE-2026-27495 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.