Budibase: Workspace-scoped builder escalates to global admin via /api/public/v1/roles/assign

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

9.0 · CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:L

EPSS

• CVE-2026-48150: 0.29% estimated exploitation activity in the next 30 days; percentile 21.90 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary /api/public/v1/roles/assign is guarded by the builderOrAdmin middleware, which passes any user who is a builder for the app id in the x-budibase-app-id header. That check admits both global builders and workspace-scoped builders (builder.apps set but builder.global unset). The controller then spreads the request body into the SDK call, and the SDK grants builder.global=true or admin.global=true on whichever user ids the caller supplies. Bob, a workspace-scoped builder with an API key, promotes himself or any other user to global admin with one POST. The whole flow is tenant-wide privilege escalation from an app-level role, available to anyone with an Enterprise license that unlocks the EXPANDEDPUBLICAPI feature. Details Controller (packages/server/src/api/controllers/public/roles.ts:13-17): Nothing filters assignmentProps. The request body's builder and admin keys flow directly into the SDK. SDK (packages/pro/src/sdk/publicApi/roles.ts:17-47): No check that the caller already…

Published by the source

12 Jun 2026, 18:28 UTC

Last modified by the source

10 Sep 2026, 03:50 UTC

Source last checked

26 Oct 2026, 12:55 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-6xp4-cf37-ppjh

2. Revision 2 · amended · 24 Oct 2026

   Amended from osv record GHSA-6xp4-cf37-ppjh

3. Revision 1 · created · 23 Oct 2026

   Published from ghsa record GHSA-6xp4-cf37-ppjh

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# Patch Next advisory brief: CVE-2026-48150

Advisory: Budibase: Workspace-scoped builder escalates to global admin via /api/public/v1/roles/assign
IDs: CVE-2026-48150, GHSA-6xp4-cf37-ppjh
Record: https://patchnext.com/advisories/cve-2026-48150 (revision 3, source checked 26 Oct 2026, 12:55 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.0)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @budibase/server 3.39.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @budibase/server: affected < 3.39.0; fixed in 3.39.0

## Suggested inspection (read-only)
- `npm ls @budibase/server --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on @budibase/server.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-6xp4-cf37-ppjh (GitHub-reviewed advisory GHSA-6xp4-cf37-ppjh lists affected ranges: npm @budibase/server >=0 <3.39.0)
- Verified: https://osv.dev/vulnerability/GHSA-6xp4-cf37-ppjh (OSV record GHSA-6xp4-cf37-ppjh lists affected ranges: npm @budibase/server >=0 <3.39.0 (fixed))

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