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CVE-2026-27577

CRITICAL

n8n: Expression Sandbox Escape Leads to RCE

Published February 25, 2026Updated February 28, 2026Source: osv

Summary

## Impact Additional exploits in the expression evaluation of n8n have been identified and patched following [CVE-2025-68613](https://github.com/n8n-io/n8n/security/advisories/GHSA-v98v-ff95-f3cp). An authenticated user with permission to create or modify workflows could abuse crafted expressions in workflow parameters to trigger unintended system command execution on the host running n8n. ## Patches The issues have 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 all known vulnerabilities. ## 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. - Deploy n8n in a hardened environment with restricted operating system privileges and network access to reduce the impact of potential exploitation. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures. ### Resources - Best practices for [securing n8n](https://docs.n8n.io/hosting/securing/overview/) - Initial vulnerability advisory: [CVE-2025-68613](https://github.com/n8n-io/n8n/security/advisories/GHSA-v98v-ff95-f3cp)

Remediation

Upgrade to the fixed version using your package manager.

npm
Update n8n to 2.9.3 or later
npm install n8n@2.9.3
npm
Update n8n to 1.123.22 or later
npm install n8n@1.123.22
npm
Update n8n to 2.10.1 or later
npm install n8n@2.10.1

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (3)

PackageEcosystemAffectedFixed In
n8n
npm
All versions2.9.3
n8n
npm
All versions1.123.22
n8n
npm
All versions2.10.1

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.9 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Frequently Asked Questions

What is CVE-2026-27577?
n8n: Expression Sandbox Escape Leads to RCE This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.9/10).
How do I check if my project is affected by CVE-2026-27577?
CVE-2026-27577 affects n8n. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-27577 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.9

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-vpcf-gvg4-6qwr

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