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Vulnerability record · CVE-2026-21877 · published 8 January 2026

CVE-2026-21877: N8n code injection vulnerability

N8n · N8n

n8n is an open source workflow automation platform. In versions 0.121.2 and below, an authenticated attacker may be able to execute malicious code using the n8n service. This could result in full compromise and can impact both self-hosted and n8n Cloud instances. This issue is fixed in version 1.121.3. Administrators can reduce exposure by disabling the Git node and limiting access for untrusted users, but upgrading to the latest version is recommended.

9.9 CVSS 3.1 Critical EPSS 5.4% · top 7.5% CWE-94 · Code injectionCWE-434 · Unrestricted file upload
9.9CVSS 3.1 base score
5.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

n8n is an open source workflow automation platform. In versions 0.121.2 and below, an authenticated attacker may be able to execute malicious code using the n8n service. This could result in full compromise and can impact both self-hosted and n8n Cloud instances. This issue is fixed in version 1.121.3. Administrators can reduce exposure by disabling the Git node and limiting access for untrusted users, but upgrading to the latest version is recommended.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/n8n-io/n8n/commit/f4b009d00d1f4ba9359b8e8f1c071e3d910a55f6 Patch
https://github.com/n8n-io/n8n/security/advisories/GHSA-v364-rw7m-3263 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2025-68613n8n workflow expression evaluation RCE for authenticated usersn8n versions from 0.211.0 before 1.120.4, 1.121.1, and 1.122.0 evaluate user-supplied workflow expressions in an execution context that is not suffic…KEVEPSS 99%analysed10.0CVE-2026-21858n8n form workflows allow unauthenticated file accessn8n versions from 1.65.0 up to but not including 1.121.0 fail to properly validate input in certain form-based workflows, letting an attacker read fi…EPSS 78%analysed9.9CVE-2026-1470N8n vulnerabilityn8n contains a critical Remote Code Execution (RCE) vulnerability in its workflow Expression evaluation system. Expressions supplied by authenticated…EPSS 21%9.9CVE-2026-0863N8n code injection vulnerabilityUsing string formatting and exception handling, an attacker may bypass n8n's python-task-executor sandbox restrictions and run arbitrary unrestricted…EPSS 9.4%9.9CVE-2025-68668N8n vulnerabilityn8n is an open source workflow automation platform. From version 1.0.0 to before 2.0.0, a sandbox bypass vulnerability exists in the Python Code Node…EPSS 13%9.5CVE-2026-27493N8n code injection vulnerabilityn8n is an open source workflow automation platform. Prior to versions 2.10.1, 2.9.3, and 1.123.22, a second-order expression injection vulnerability …EPSS 1.6%9.4CVE-2026-44789N8n prototype pollution vulnerabilityn8n is an open source workflow automation platform. Prior to 1.123.43, 2.22.1, and 2.20.7, an authenticated user with permission to create or modify …EPSS 0.53%9.4CVE-2026-44790N8n argument injection vulnerabilityn8n is an open source workflow automation platform. Prior to 1.123.43, 2.22.1, and 2.20.7, an authenticated user with permission to create or modify …EPSS 0.53%

Source: NIST National Vulnerability Database (record CVE-2026-21877), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.