CVE-2026-21858

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-21858
n8n is an open source workflow automation platform. Versions starting with 1.65.0 and below 1.121.0 enable an attacker to access files on the underlying server through execution of certain form-based workflows. A vulnerable workflow could grant access to an unauthenticated remote attacker, resulting in exposure of sensitive information stored on the system and may enable further compromise depending on deployment configuration and workflow usage. This issue is fixed in version 1.121.0.

10.0 /10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References
Link Resource
https://github.com/n8n-io/n8n/security/advisories/GHSA-v4pr-fm98-w9pg Vendor Advisory
https://www.cyera.com/research-labs/ni8mare-unauthenticated-remote-code-execution-in-n8n-cve-2026-21858 Exploit Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*
History

16 Jan 2026, 19:31

Type Values Removed Values Added
CPE cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*
First Time N8n n8n
N8n
References () https://github.com/n8n-io/n8n/security/advisories/GHSA-v4pr-fm98-w9pg - () https://github.com/n8n-io/n8n/security/advisories/GHSA-v4pr-fm98-w9pg - Vendor Advisory
References () https://www.cyera.com/research-labs/ni8mare-unauthenticated-remote-code-execution-in-n8n-cve-2026-21858 - () https://www.cyera.com/research-labs/ni8mare-unauthenticated-remote-code-execution-in-n8n-cve-2026-21858 - Exploit, Third Party Advisory

12 Jan 2026, 19:16

Type Values Removed Values Added
References
  • () https://www.cyera.com/research-labs/ni8mare-unauthenticated-remote-code-execution-in-n8n-cve-2026-21858 -

08 Jan 2026, 20:15

Type Values Removed Values Added
Summary (en) n8n is an open source workflow automation platform. Versions below 1.121.0 enable an attacker to access files on the underlying server through execution of certain form-based workflows. A vulnerable workflow could grant access to an unauthenticated remote attacker, resulting in exposure of sensitive information stored on the system and may enable further compromise depending on deployment configuration and workflow usage. This issue is fixed in version 1.121.0. (en) n8n is an open source workflow automation platform. Versions starting with 1.65.0 and below 1.121.0 enable an attacker to access files on the underlying server through execution of certain form-based workflows. A vulnerable workflow could grant access to an unauthenticated remote attacker, resulting in exposure of sensitive information stored on the system and may enable further compromise depending on deployment configuration and workflow usage. This issue is fixed in version 1.121.0.

08 Jan 2026, 00:15

Type Values Removed Values Added
New CVE
Information

Published : 2026-01-08 00:15

Updated : 2026-01-16 19:31

NVD link : CVE-2026-21858

Mitre link : CVE-2026-21858

CVE.ORG link : CVE-2026-21858

JSON object : View

Products Affected

n8n

  • n8n
CWE
CWE-20

Improper Input Validation