🛡️ CVE-2026-21893 — n8n

🔴 CVSS 9.5 — Critical ✅ No Known Exploit CWE-20 OSV
9.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

n8n Vulnerable to Command Injection in Community Package Installation

Impact

A Command Injection vulnerability was identified in n8n’s community package installation functionality. The issue allowed authenticated users with administrative permissions to execute arbitrary system commands on the n8n host under specific conditions.

Important context

  • Exploitation requires _administrative_ access to the n8n instance.
  • The affected functionality is restricted to trusted users who are already permitted to install third-party community packages.
  • No unauthenticated or low-privilege exploitation is possible.
  • There is no evidence of exploitation in the wild.

Because administrative users can already extend n8n with custom or community code, the vulnerability does not meaningfully expand the threat model beyond existing administrator capabilities. However, it represents a violation of secure coding practices and has therefore been addressed.

Patches

Users are advised to upgrade to n8n version 1.120.3 or later, which fully resolves the issue.

As a general security best practice, n8n instance owners should ensure that:

  • Administrative access is limited to trusted users only.
  • Community packages are installed only from trusted sources.
  • Instances are kept up to date with the latest security releases.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs administrative privileges on the target. No user interaction is required. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2026-21893 is classified as CWE-20: Improper Input Validation. The application accepts input without checking that it has the expected form, so malformed values reach code that assumes they are well formed.

Affected software

CVE-2026-21893 is recorded against 1 package.

  • n8n

Timeline and source

Published on 4 February 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from OSV.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Package)

Details

Severity CRITICAL
CVSS Score 9.5
CVSS Vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CWE CWE-20
Public Exploit ✅ No
Source OSV
Published 2026-02-04
Updated 2026-08-12
Modified 2026-06-17

Affected Packages

Software From version Fixed in
n8n — —

Similar Threats

Exploit Protection

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