Budibase: Missing RBAC on GET /api/global/groups allows BASIC users to enumerate all tenant groups and role mappings

Exploitation

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

CVSS

4.3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS

• CVE-2026-73301: 0.34% estimated exploitation activity in the next 30 days; percentile 27.81 (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 The GET /api/global/groups endpoint on the worker service has no role-based authorization middleware. Any authenticated user (including BASIC role) can enumerate all user groups in the tenant, including their role mappings, user memberships, builder permissions, and the isDefault flag. Steps to Reproduce 1. Start Budibase 2. Login as admin, create a user group, create a BASIC user 3. Login as BASIC user and enumerate all groups (the vulnerability) Expected: 403 Forbidden (consistent with GET /api/global/groups/:id which requires builderOrAdmin) Actual: 200 OK with full group data including role mappings, member lists, and builder flags. Standalone verification (code review) Output shows the list endpoint has NO auth middleware: Compare with the single-group endpoint directly below: Root Cause File: packages/worker/src/api/routes/global/groups.ts, lines 40-44 The list endpoint is the ONLY group endpoint without RBAC: | Endpoint | Auth Middleware | |----------|---------------|…

Published by the source

24 Jul 2026, 21:13 UTC

Last modified by the source

18 Aug 2026, 23:51 UTC

Source last checked

26 Oct 2026, 13:01 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-4qcj-m5wp-jmf4

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-4qcj-m5wp-jmf4

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# Patch Next advisory brief: CVE-2026-73301

Advisory: Budibase: Missing RBAC on GET /api/global/groups allows BASIC users to enumerate all tenant groups and role mappings
IDs: CVE-2026-73301, GHSA-4qcj-m5wp-jmf4
Record: https://patchnext.com/advisories/cve-2026-73301 (revision 2, source checked 26 Oct 2026, 13:01 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 4.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @budibase/server: affected <= 3.38.1

## 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
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## 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://osv.dev/vulnerability/GHSA-4qcj-m5wp-jmf4 (OSV record GHSA-4qcj-m5wp-jmf4 lists affected ranges: npm @budibase/server >=0 <=3.38.1)
- Verified: https://github.com/advisories/GHSA-4qcj-m5wp-jmf4 (GitHub-reviewed advisory GHSA-4qcj-m5wp-jmf4 lists affected ranges: npm @budibase/server >=0 <=3.38.1)

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