---
title: "CVE-2026-27577: n8n: Expression Sandbox Escape Leads to RCE"
url: https://erroneo.us/security/cve/CVE-2026-27577/
description: "CVE-2026-27577 (n8n (npm)): n8n is an open source workflow automation platform. Prior to versions 2.10.1, 2.9.3, and 1.123.22, additional exploits in the…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-02-25
date_modified: 2026-07-28
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-27577"
kev: false
cvss: 9.4
epss: 0.01036
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-27577: n8n: Expression Sandbox Escape Leads to RCE

**Signal:** Critical, preconditions apply. Severe if exploited, but exploitation needs conditions that may not apply to you. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 1.0% , percentile 64: FIRST’s model estimates a 1.0% chance of exploitation activity in the next 30 days, higher than 64% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Needs an account (low (any account)). Exposure depends on who can log in.
- Only applies if your dependency tree includes n8n (npm) < 1.123.22, fixed in 1.123.22 ; n8n (npm) >= 2.0.0, < 2.9.3, fixed in 2.9.3 ; n8n (npm) >= 2.10.0, < 2.10.1, fixed in 2.10.1 . Check your lockfile, including transitive dependencies.

## What it is

n8n is an open source workflow automation platform. Prior to versions 2.10.1, 2.9.3, and 1.123.22, additional exploits in the expression evaluation of n8n have been identified and patched following CVE-2025-68613. 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. 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. 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 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.

## Affected packages

- npm `n8n` < 1.123.22 → fixed: 1.123.22
- npm `n8n` >= 2.0.0, < 2.9.3 → fixed: 2.9.3
- npm `n8n` >= 2.10.0, < 2.10.1 → fixed: 2.10.1

## Affected products (CVE record)

- n8n-io n8n: < 1.123.22, >= 2.0.0, < 2.9.3, >= 2.10.0, < 2.10.1

## Severity

- GitHub_M CVSS 4.0: 9.4 `CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`
- GitHub CVSS 4.0: 9.4 `CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 1.04% probability of exploitation activity in the next 30 days; percentile 64.

## Sources

- [GitHub Advisory GHSA-vpcf-gvg4-6qwr](https://github.com/advisories/GHSA-vpcf-gvg4-6qwr)
- [CVE.org record CVE-2026-27577](https://www.cve.org/CVERecord?id=CVE-2026-27577)
- [NVD entry CVE-2026-27577](https://nvd.nist.gov/vuln/detail/CVE-2026-27577)
- [github.com](https://github.com/n8n-io/n8n/security/advisories/GHSA-vpcf-gvg4-6qwr)
- [github.com](https://github.com/n8n-io/n8n/security/advisories/GHSA-v98v-ff95-f3cp)
- [github.com](https://github.com/n8n-io/n8n/commit/1479aab2d32fe0ee087f82b9038b1035c98be2f6)
- [github.com](https://github.com/n8n-io/n8n/commit/9e5212ecbc5d2d4e6f340b636a5e84be6369882e)
- [docs.n8n.io](https://docs.n8n.io/hosting/securing/overview)

---
Source page: https://erroneo.us/security/cve/CVE-2026-27577/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt