CVE-2026-72859: high-severity vulnerability in budibase server
Budibase 3.39.4 before 3.40.0 Authorization Regression via S3 Presigned URL
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.3epss 0.2%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N
Affected products
budibase · serverRelated CVEs — budibase server
In the same product, most dangerous first.
CVE-2026-82244CRITICALBudibase before 3.41.3 Remote Code Execution via Plugin eval()EPSS 0.9%CVE-2026-100682HIGHBudibase Server before 3.45.0 Arbitrary File Write via ZIP SymlinkEPSS 0.7%CVE-2026-72850CRITICALBudibase before 3.40.0 Arbitrary File Write via Path TraversalEPSS 0.5%CVE-2026-100684CRITICALBudibase Server 3.41.0 before 3.45.0 Authentication Bypass via OIDCEPSS 0.4%CVE-2026-82245HIGHBudibase before 3.41.3 Missing Authorization License ManagementEPSS 0.4%CVE-2026-72855HIGHBudibase before 3.40.0 DNS Rebinding SSRF via OpenAPI and RESTEPSS 0.4%