CVE-2026-27494Network attack vector

Authenticated host compromise via Python sandbox escape

Published Feb 25, 2026 · Updated Feb 25, 2026

Sandbox escape in n8n before 1.123.22, 2.0.0 through 2.9.2, and 2.10.0 allows remote authenticated users to read host files or execute code. The Python Code node sandbox permits crafted workflow code to reach built-in Python objects that expose host resources beyond its intended isolation boundary. Exploitation requires workflow creation or editing rights and enabled Task Runners; internal runners expose the n8n host, while external runners confine impact to the runner environment.

CVSS severity9.4
Critical
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sandbox escape in n8n before 1.123.22, 2.0.0 through 2.9.2, and 2.10.0 allows remote authenticated users to read host files or execute code. The Python Code node sandbox permits crafted workflow code to reach built-in Python objects that expose host resources beyond its intended isolation boundary. Exploitation requires workflow creation or editing rights and enabled Task Runners; internal runners expose the n8n host, while external runners confine impact to the runner environment.

The record

CVE
CVE-2026-27494
Published
Feb 25, 2026
Updated
Feb 25, 2026
Vendor
n8n
Product
n8n
Classifications
CWE-497, CAPEC-170, CAPEC-694, T1059.006
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.123.22
  2. Affected versionversion=>= 2.0.0, < 2.9.3
  3. Affected versionversion=>= 2.10.0, < 2.10.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

n8n · n8nversion=< 1.123.22; version=>= 2.0.0, < 2.9.3; version=>= 2.10.0, < 2.10.1

Published CVSS scores

9.9NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
9.4GitHub, Inc.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
9.9GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-497Exposure of Sensitive System Information to an Unauthorized Control Sphere
CAPEC-170Web Application Fingerprinting
CAPEC-694System Location Discovery
T1059.006Command and Scripting Interpreter: Python

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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