Vulnerability Description
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 Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/Budibase/budibase/releases/tag/3.38.2
- https://github.com/Budibase/budibase/security/advisories/GHSA-82rc-gxrg-v4gf
- https://github.com/Budibase/budibase/security/advisories/GHSA-82rc-gxrg-v4gf
FAQ
What is CVE-2026-46426?
CVE-2026-46426 is a vulnerability with a CVSS score of 7.6 (HIGH). 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 f...
How severe is CVE-2026-46426?
CVE-2026-46426 has been rated HIGH with a CVSS base score of 7.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-46426?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.