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.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/Budibase/budibase/security/advisories/GHSA-j82g-67x3-xcwh
https://www.vulncheck.com/advisories/budibase-before-authentication-bypass-via-tenant-owner-email

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-13 22:17

Updated : 2026-08-31 20:30

NVD link : CVE-2026-72856

Mitre link : CVE-2026-72856

CVE.ORG link : CVE-2026-72856

JSON object : View

Products Affected

No product.

CWE

CWE-640

Weak Password Recovery Mechanism for Forgotten Password

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