CVE-2026-54351: Budibase

Critical severity, CVSS 9.6. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Budibase Budibase: before 3.39.9 (fixed in 3.39.9)

Published 2026-06-26. Last modified 2026-06-30.