---
id: CVE-2026-100684
title: >-
  Budibase versions 3.41.0 before 3.45.0 contain an authentication bypass in the
  OIDC/SSO login path of @budibase/server
summary: >-
  Budibase versions 3.41.0 before 3.45.0 contain an authentication bypass in the
  OIDC/SSO login path of @budibase/server. In sso.authenticate, when no existing
  user matches the incoming SSO subject, the server looks up pending user
  invites…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-287
vendor: budibase
product: server
affected:
  - server >= 3.41.0 < 3.45.0
published: '2026-09-26'
updated: '2026-09-26'
sourceUpdated: '2026-09-26T14:16:52.720'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100684'
references:
  - url: >-
      https://github.com/Budibase/budibase/security/advisories/GHSA-35ch-57g2-3g98
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/budibase-server-3.41.0-before-3.45.0-authentication-bypass-via-oidc
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-26T13:33:20.906Z'
---

## Overview

Budibase versions 3.41.0 before 3.45.0 contain an authentication bypass in the OIDC/SSO login path of @budibase/server. In sso.authenticate, when no existing user matches the incoming SSO subject, the server looks up pending user invites by the IdP-asserted email address alone — without validating an invite code and without an email_verified check (the email_verified gate protects only the existing-account lookup). An attacker who can register at an IdP that the tenant trusts for OIDC and assert a victim's invited email address (even with email_verified=false) claims the pending invite and inherits all of its granted privileges, including builder and admin.global, with no admin exclusion. This results in takeover of the invited principal and, for admin invites, full tenant compromise (access to all apps, datasources including production credentials, and automations); the invite is consumed, denying onboarding to the legitimate invitee.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.