Vulnerability · Published May 27, 2026 · Assigned by GitHub_M

CVE-2026-45716Budibase: Builder-to-Admin Privilege Escalation via onboardUsers Endpoint Without SMTP Configuration

High 8.8

In plain English

A high-severity privilege mismanagement in budibase from Budibase. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.3%top 82.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Budibase is an open-source low-code platform. Prior to 3.38.1, the POST /api/global/users/onboard endpoint is protected by workspaceBuilderOrAdmin middleware, allowing any user with builder permissions to access it. When SMTP email is not configured (the default for self-hosted Budibase instances), this endpoint bypasses the admin-restricted invite flow and directly creates users via bulkCreate, accepting arbitrary admin and builder role assignments from the request body. A builder-level user can create a new global admin account and receive the generated password in the response, achieving full privilege escalation. This vulnerability is fixed in 3.38.1.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	@budibase/worker	3.38.1	GHSA-c54j-xp92-wh28

Affected products (as reported)

Vendor	Product	Versions
Budibase	budibase	< 3.38.1

Weakness: CWE-269 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

https://github.com/Budibase/budibase/security/advisories/GHSA-c54j-xp92-wh28 x_refsource_CONFIRM
https://github.com/Budibase/budibase/releases/tag/3.38.1 x_refsource_MISC