Arbitrary File Upload Affecting @budibase/server package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published4 Jul 2026
- disclosed19 May 2026
- creditUnknown
Introduced: 19 May 2026
CVE-2026-46426 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
@budibase/server is a Budibase Web Server
Affected versions of this package are vulnerable to Arbitrary File Upload via file upload endpoint POST /api/attachments/process that does not enforce active-content restrictions for authenticated users. The checks for dangerous file extensions (html, svg, js, php, etc.) are conditionally wrapped inside if (isPublicUser) or if (isPublicUser || !env.SELF_HOSTED), meaning any authenticated builder can upload executable web conten.