n8n-io n8n up to 1.121.2 code injection

CVSS Meta Temp Score
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CTI Interest Score
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7.9$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in n8n-io n8n up to 1.121.2. Affected by this vulnerability is an unknown functionality. Performing a manipulation results in code injection. This vulnerability is cataloged as CVE-2026-21877. It is possible to initiate the attack remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in n8n-io n8n up to 1.121.2. It has been classified as critical. This affects some unknown functionality. The manipulation with an unknown input leads to a code injection vulnerability. CWE is classifying the issue as CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-21877 since 01/05/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 282600 (n8n Node.js Package < 1.121.3 RCE (CVE-2026-21877)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.121.3 eliminates this vulnerability. Applying the patch f4b009d00d1f4ba9359b8e8f1c071e3d910a55f6 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at CNNVD (CNNVD-202601-1575) and Tenable (282600). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 7.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.9
CNA Vector (GitHub_M): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Code injection
CWE: CWE-94 / CWE-74 / CWE-707
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 282600
Nessus Name: n8n Node.js Package < 1.121.3 RCE (CVE-2026-21877)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: n8n 1.121.3
Patch: f4b009d00d1f4ba9359b8e8f1c071e3d910a55f6

Timelineinfo

01/05/2026 CVE reserved
01/08/2026 +3 days Advisory disclosed
01/08/2026 +0 days VulDB entry created
01/13/2026 +5 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-v364-rw7m-3263
Status: Confirmed

CVE: CVE-2026-21877 (🔒)
GCVE (CVE): GCVE-0-2026-21877
GCVE (VulDB): GCVE-100-339999
CNNVD: CNNVD-202601-1575 - n8n 代码问题漏洞

Entryinfo

Created: 01/08/2026 08:00
Updated: 01/13/2026 05:39
Changes: 01/08/2026 08:00 (66), 01/09/2026 15:28 (6), 01/10/2026 16:41 (1), 01/11/2026 21:46 (1), 01/13/2026 05:39 (2)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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