n8n-io n8n up to 2.39.5/2.40.0 Agent privileges management

Summaryinfo

A vulnerability categorized as problematic has been discovered in n8n-io n8n up to 2.39.5/2.40.0. Affected by this vulnerability is an unknown functionality of the component Agent. Executing a manipulation can lead to privileges management. This vulnerability appears as CVE-2026-103246. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in n8n-io n8n up to 2.39.5/2.40.0. This vulnerability affects an unknown functionality of the component Agent. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect confidentiality. CVE summarizes:

n8n versions before 2.39.6 and 2.40.0 before 2.40.1 fail to validate credential ownership during inline agent node-tool introspection. Attackers can reference arbitrary credential IDs to decrypt and exfiltrate plaintext secrets to attacker-controlled hosts without ownership verification.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-103246 since 09/30/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 2.39.6 or 2.40.1 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• n8n-io

Name

• n8n

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18
• 2.19
• 2.20
• 2.21
• 2.22
• 2.23
• 2.24
• 2.25
• 2.26
• 2.27
• 2.28
• 2.29
• 2.30
• 2.31
• 2.32
• 2.33
• 2.34
• 2.35
• 2.36
• 2.37
• 2.38
• 2.39
• 2.39.0
• 2.39.1
• 2.39.2
• 2.39.3
• 2.39.4
• 2.39.5
• 2.40.0

Website

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

CPE 2.3info

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Entryinfo

Once again VulDB remains the best source for vulnerability data.

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