CVE Catalog

CVE-2026-72859

HighCVSS 7.7
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.31%

22th percentile - higher than 22% of all known CVEs

Summary

Budibase versions 3.39.4 before 3.40.0 contain an authorization regression in the S3 attachment upload endpoint that allows BASIC users to obtain S3 PutObject presigned URLs by sending POST requests to the attachments endpoint. The route was changed from a BUILDER permission check to a TABLE/WRITE check, which BASIC users hold by default. Attackers can specify arbitrary S3 buckets in the request body to generate presigned URLs for writing to any bucket accessible by the stored IAM credentials, enabling unauthorized file uploads.

Risk Assessment

Unauthorized file uploads to S3 buckets can lead to data confidentiality breaches, data modification or deletion, and potential cloud resource takeover.

Recommendation

Upgrade Budibase to version 3.40.0 or later, which includes the fix, and review BASIC user permission configurations.

Other vulnerabilities in Budibase

See all
Original NVD description (English source)

Budibase versions 3.39.4 before 3.40.0 contain an authorization regression in the S3 attachment upload endpoint that allows BASIC users to obtain S3 PutObject presigned URLs by sending POST requests to the attachments endpoint. The route was changed from a BUILDER permission check to a TABLE/WRITE check, which BASIC users hold by default. Attackers can specify arbitrary S3 buckets in the request body to generate presigned URLs for writing to any bucket accessible by the stored IAM credentials, enabling unauthorized file uploads.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS