n8n-io n8n up to 1.123.17/2.4.x toctou

Summaryinfo

A vulnerability, which was classified as critical, was found in n8n-io n8n up to 1.123.17/2.4.x. Impacted is an unknown function. Such manipulation leads to toctou. This vulnerability is referenced as CVE-2026-25052. It is possible to launch the attack remotely. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in n8n-io n8n up to 1.123.17/2.4.x. Affected by this issue is some unknown functionality. The manipulation with an unknown input leads to a toctou vulnerability. Using CWE to declare the problem leads to CWE-367. The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state. Impacted is confidentiality, integrity, and availability. CVE summarizes:

n8n is an open source workflow automation platform. Prior to versions 1.123.18 and 2.5.0, a vulnerability in the file access controls allows authenticated users with permission to create or modify workflows to read sensitive files from the n8n host system. This can be exploited to obtain critical configuration data and user credentials, leading to complete account takeover of any user on the instance. This issue has been patched in versions 1.123.18 and 2.5.0.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-25052 since 01/28/2026. The exploitation is known to be easy. The attack may be launched remotely. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 298985 (n8n Node.js Package < 1.123.18 / 2.x < 2.5.0 Arbitrary File Read (CVE-2026-25052)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.123.18 or 2.5.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (298985) and CERT Bund (WID-SEC-2026-0318). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

• n8n n8n

Productinfo

Vendor

• n8n-io

Name

• n8n

Version

• 1.123.0
• 1.123.1
• 1.123.2
• 1.123.3
• 1.123.4
• 1.123.5
• 1.123.6
• 1.123.7
• 1.123.8
• 1.123.9
• 1.123.10
• 1.123.11
• 1.123.12
• 1.123.13
• 1.123.14
• 1.123.15
• 1.123.16
• 1.123.17
• 2.0
• 2.1
• 2.2
• 2.3
• 2.4

Website

• Product: https://github.com/n8n-io/n8n/

CPE 2.3info

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CPE 2.2info

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Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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