要点
- CVE-2026-27495 は n8n (n8n), n8n に影響する深刻度「緊急」 (CVSS 9.9) の脆弱性です。
- 今後30日間に悪用される確率（EPSS）：0.79%（全脆弱性の 56.4% より高い）。
- 対処：2.9.3, 2.10.1, 1.123.22 以降に更新してください。
| パッケージ | 影響を受けるバージョン | 修正済みバージョン |
|---|
| n8n | ≥ 2.0.0, < 2.9.3≥ 2.10.0, < 2.10.1< 1.123.22
| 2.9.32.10.11.123.22
|
| n8n npm | ≥ 2.0.0, < 2.9.3≥ 2.10.0, < 2.10.1< 1.123.22
| 2.9.32.10.11.123.22
|
概要
Impact
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.
Patches
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.
Workarounds
If upgrading is not immediately possible, administrators should consider the following temporary mitigations:
- Limit workflow creation and editing permissions to fully trusted users only.
- 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.
Resources
NVD の説明
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.
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