CVE-2026-72856
Budibase versions before 3.40.0 contain an authorization/authentication bypass in the PUT /api/global/users/tenant/owner (changeTenantOwnerEmail) endpoint. On self-hosted instances (SELF_HOSTED or DISABLE_ACCOUNT_PORTAL set), the cloudRestricted middleware is a no-op and the route is protected only by a general authentication check, so any authenticated user — including a lowest-privilege BASIC app user — can reassign the tenant account-holder (top-privilege admin) email to an attacker-controlled address. The attacker can then use the public password-reset flow to take over the admin account, leading to full administrative access.
- Affected products
- Budibase
- Fix
- Available
- CVSS 4.0
- 8.6 HIGH
- CVSS 3.1
- 8.1 HIGH
- EPSS
- 0.3% (26th percentile)
- Weakness
- CWE-640
- NVD status
- Received
- Published
- 2026-08-13
No indexed exploits for CVE-2026-72856 yet
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No exploit for CVE-2026-72856 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.