CVE-2026-50136

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.

Score
CVSS 3.1 7.4 High
Status
Analyzed - security-advisories@github.com
Published
2026-06-26
Last modified
2026-06-27
Weaknesses
CWE-306

Affected products

References

 
 
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