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 creden…
Published: 2026-06-26 · CVSS: 7.4 · CVSS 3.1
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 authentication, table permission, datasource permission, or builder access. A public caller who knows a workspace ID and S3 datasource ID can request a signed upload URL for attacker-controlled bucket and key values. This vulnerability is fixed in 3.39.3.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7