CVE-2026-27495
n8n has a Sandbox Escape in its JavaScript Task Runner
Description
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.
INFO
Published Date :
Feb. 25, 2026, 11:16 p.m.
Last Modified :
March 4, 2026, 3:41 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Upgrade n8n to version 2.10.1, 2.9.3, or 1.123.22 or later.
- Limit workflow creation and editing permissions.
- Consider using external runner mode if upgrading is not possible.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-27495.
| URL | Resource |
|---|---|
| https://docs.n8n.io/hosting/configuration/task-runners | Product |
| https://github.com/n8n-io/n8n/releases/tag/[email protected] | Release Notes |
| https://github.com/n8n-io/n8n/releases/tag/[email protected] | Release Notes |
| https://github.com/n8n-io/n8n/releases/tag/[email protected] | Release Notes |
| https://github.com/n8n-io/n8n/security/advisories/GHSA-jjpj-p2wh-qf23 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-27495 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-27495
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-27495 vulnerability anywhere in the article.
-
The Hacker News
Critical n8n Flaws Allow Remote Code Execution and Exposure of Stored Credentials
Cybersecurity researchers have disclosed details of two now-patched security flaws in the n8n workflow automation platform, including two critical bugs that could result in arbitrary command execution ... Read more
-
security.nl
Ruim honderdduizend n8n-servers missen update voor kritiek beveiligingslek
Ruim honderdduizend n8n-servers, waaronder meer dan 2500 in Nederland, missen een beveiligingsupdate voor een kritiek beveiligingslek dat aanvallers in het ergste geval volledige controle over de serv ... Read more
-
Daily CyberSecurity
Automation at Risk: Triple 9.4 Severity RCE Flaws Threaten n8n Workflow Servers
n8n is a popular workflow automation platform that gives technical teams the flexibility of code with the speed of no-code. With 400+ integrations, native AI capabilities, and a fair-code license, n8n ... Read more
The following table lists the changes that have been made to the
CVE-2026-27495 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 04, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:* versions up to (excluding) 1.123.22 *cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:* versions from (including) 2.0.0 up to (excluding) 2.9.3 *cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:* versions from (including) 2.10.0 up to (excluding) 2.10.1 Added Reference Type GitHub, Inc.: https://docs.n8n.io/hosting/configuration/task-runners Types: Product Added Reference Type GitHub, Inc.: https://github.com/n8n-io/n8n/releases/tag/[email protected] Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/n8n-io/n8n/releases/tag/[email protected] Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/n8n-io/n8n/releases/tag/[email protected] Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/n8n-io/n8n/security/advisories/GHSA-jjpj-p2wh-qf23 Types: Vendor Advisory -
New CVE Received by [email protected]
Feb. 25, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-94 Added Reference https://docs.n8n.io/hosting/configuration/task-runners Added Reference https://github.com/n8n-io/n8n/releases/tag/[email protected] Added Reference https://github.com/n8n-io/n8n/releases/tag/[email protected] Added Reference https://github.com/n8n-io/n8n/releases/tag/[email protected] Added Reference https://github.com/n8n-io/n8n/security/advisories/GHSA-jjpj-p2wh-qf23