CVE-2026-50136 Budibase: Unauthenticated S3 signed upload URL generation allows arbitrary writes with stored datasource credentials

Budibase is an open-source low-code platform. Prior to 3.39.3, the application server exposes an unauthenticated endpoint that generates S3 PutObject presigned URLs using credentials stored in a workspace datasource. The route is protected only by the recaptcha middleware and does not require...

PT-2026-51454

Name of the Vulnerable Software and Affected Versions Budibase versions prior to 3.39.0 Description An authentication bypass exists in the Budibase server route POST /api/attachments/:datasourceId/url because it lacks the authorized... middleware. An anonymous attacker who can enumerate a workspa...