CVE-2026-50136
High · 7.4CVSS
7.4
EPSS
0.3%
Published
Jun 26, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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