n8n-io n8n up to 2.31.4/2.32.0 Token Exchange Embed Login feature improper authentication

Summaryinfo

A vulnerability described as critical has been identified in n8n-io n8n up to 2.31.4/2.32.0. This issue affects some unknown processing of the component Token Exchange Embed Login feature. Such manipulation leads to improper authentication. This vulnerability is documented as CVE-2026-72772. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in n8n-io n8n up to 2.31.4/2.32.0. It has been rated as critical. Affected by this issue is an unknown code block of the component Token Exchange Embed Login feature. The manipulation with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality, integrity, and availability. CVE summarizes:

n8n before 2.32.1 (and before 2.31.5) is vulnerable to account takeover via the Token Exchange Embed Login feature. When a validly-signed incoming token was matched to a local account by its email claim, the service did not verify that the email claim was verified, nor that the trusted key's permitted role ceiling covered that account. As a result, anyone able to obtain a token accepted by a configured trusted key (for example, a trusted issuer emitting unverified email addresses) could authenticate as any existing user and gain full account control. This issue only affects instances where the embed login feature is enabled and at least one trusted key source is configured.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-72772 since 08/10/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available.

Upgrading to version 2.31.5 or 2.32.1 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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
• 2.31.0
• 2.31.1
• 2.31.2
• 2.31.3
• 2.31.4
• 2.32.0

Website

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

CPE 2.3info

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CPE 2.2info

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