SB2026020670 - Multiple vulnerabilities in n8n

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Main Vulnerability Database SB2026020670

SB2026020670 - Multiple vulnerabilities in n8n

Published: February 6, 2026 Updated: April 23, 2026

Security Bulletin ID SB2026020670
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Medium 33% Low 67%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


1) Time-of-check Time-of-use (TOCTOU) Race Condition (CVE-ID: CVE-2026-25052)

CWE-ID: CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to a time-of-check, time-of-use (TOCTOU) race condition in the file access controls. A remote user can obtain critical configuration data and user credentials to gain elevated privileges on the target system.


2) Authentication Bypass by Spoofing (CVE-ID: N/A)

CWE-ID: CWE-290 - Authentication Bypass by Spoofing

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote attacker to inject arbitrary data into a workflow.

The vulnerability exists due to authentication bypass by spoofing in the ZendeskTrigger node when handling webhook POST requests. A remote attacker can send unsigned POST requests to inject arbitrary data into a workflow.

Exploitation requires knowledge of the webhook URL for a workflow using the ZendeskTrigger node.


3) Authentication Bypass by Spoofing (CVE-ID: N/A)

CWE-ID: CWE-290 - Authentication Bypass by Spoofing

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote attacker to trigger the workflow with arbitrary data.

The vulnerability exists due to authentication bypass by spoofing in the GitHub Webhook Trigger node when handling webhook POST requests. A remote attacker can send unsigned POST requests to trigger the workflow with arbitrary data.

Exploitation requires knowledge of the webhook URL.


Remediation

Install update from vendor's website.

References