n8n-io n8n Link Preview Rendering injection

Summaryinfo

A vulnerability was found in n8n-io n8n. It has been rated as critical. This affects an unknown part of the component Link Preview Rendering. The manipulation leads to injection. This vulnerability is traded as CVE-2026-77075. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in n8n-io n8n (version unknown). It has been rated as critical. This issue affects an unknown function of the component Link Preview Rendering. The manipulation with an unknown input leads to a injection vulnerability. Using CWE to declare the problem leads to CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

n8n before 1.123.69, 2.x before 2.33.4, and 2.34.x before 2.34.1 contain an expression injection vulnerability in resource-locator field link preview rendering. The editor spliced the field's stored value directly into the node type's URL template without checking for expression syntax. An authenticated member can store a malicious value so that when another user opens the affected node in the editor, the injected expression is evaluated as JavaScript in the victim's authenticated session (cross-user script execution).

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-77075 since 08/20/2026. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/20/2026). The attack technique deployed by this issue is T1055 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• n8n-io

Name

• n8n

Website

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

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CPE 2.2info

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