CVE-2026-46426: high-severity vulnerability in budibase
Budibase: Unrestricted Upload of File with Dangerous Type
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.6epss 0.2%
Budibase is an open-source low-code platform. Prior to 3.38.2, the file upload endpoint POST /api/attachments/process does not enforce active-content restrictions for authenticated users. The checks for dangerous file extensions are conditionally wrapped inside if (isPublicUser) or if (isPublicUser || !env.SELF_HOSTED), meaning any authenticated builder can upload executable web content — SVG files with inline <script> tags, HTML pages with JavaScript, .js modules — which are then stored in the object store (MinIO/S3) with their correct MIME types. When the resulting signed URL is opened by any app user, the browser executes the payload. Impact is persistent stored XSS over all application end users. This vulnerability is fixed in 3.38.2.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
Affected products
Budibase · budibaseRelated CVEs — budibase
In the same product, most dangerous first.
CVE-2026-31816CRITICALBudibase Universal Auth Bypass via Webhook Query Param InjectionEPSS 16.7%CVE-2026-35216CRITICALBudibase: Unauthenticated Remote Code Execution via Webhook Trigger and Bash Automation StepEPSS 10.9%CVE-2023-29010MEDIUMBudiBase Server-Side Request Forgery vulnerabilityEPSS 0.6%CVE-2026-25040MEDIUMBudibase Vulnerable to Privilege Escalation via API Abuse – Creator Can Invite Users with Admin/Any RoleEPSS 0.6%CVE-2026-73300CRITICALBudibase: SQL Injection via `multipleStatements: true`EPSS 0.6%CVE-2026-35214HIGHBudibase: Path traversal in plugin file upload enables arbitrary directory deletion and file writeEPSS 0.6%