budibase up to 3.39.8 Webhook Trigger Endpoint externalTrigger dynamically-determined object attributes

Summaryinfo

A vulnerability marked as problematic has been reported in budibase up to 3.39.8. Affected by this issue is the function externalTrigger of the component Webhook Trigger Endpoint. The manipulation leads to dynamically-determined object attributes. This vulnerability is documented as CVE-2026-54351. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in budibase up to 3.39.8 and classified as problematic. This issue affects the function externalTrigger of the component Webhook Trigger Endpoint. The manipulation with an unknown input leads to a dynamically-determined object attributes vulnerability. Using CWE to declare the problem leads to CWE-915. The product receives input from an upstream component that specifies multiple attributes, properties, or fields that are to be initialized or updated in an object, but it does not properly control which attributes can be modified. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Budibase is an open-source low-code platform. Prior to 3.39.9, the webhook trigger endpoint in Budibase is publicly accessible and passes the full HTTP request body into automation execution parameters. A mass assignment vulnerability in externalTrigger() allows an attacker to overwrite the internal appId property by including it in the webhook POST body. When the automation is processed asynchronously (the default path for webhooks without a collect step), the worker executes the attacker-defined automation in the context of the victim's workspace, granting full read/write access to the victim's database. This vulnerability is fixed in 3.39.9.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-54351 since 06/12/2026. The exploitation is known to be difficult. The attack may be initiated remotely. Technical details are known, but no exploit is available.

Upgrading to version 3.39.9 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-39916). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• budibase

Version

• 3.39.0
• 3.39.1
• 3.39.2
• 3.39.3
• 3.39.4
• 3.39.5
• 3.39.6
• 3.39.7
• 3.39.8

Website

• Product: https://github.com/Budibase/budibase/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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