---
id: CVE-2026-73409
title: Budibase is an open-source low-code platform
summary: >-
  Budibase is an open-source low-code platform. Prior to 3.40.1,
  packages/server/src/integrations/mongodb.ts passed builder-controlled
  tlsCertificateKeyFile and tlsCAFile values directly to MongoClient on Budibase
  Cloud. A builder could su…
severity: none
cwe:
  - CWE-203
published: '2026-08-12'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:56:50.520'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73409'
references:
  - url: >-
      https://github.com/Budibase/budibase/commit/e58aa31e18272f6a1a8aeb525b7eef0b01b1dd43
    label: security-advisories@github.com
  - url: 'https://github.com/Budibase/budibase/pull/19244'
    label: security-advisories@github.com
  - url: 'https://github.com/Budibase/budibase/releases/tag/3.40.1'
    label: security-advisories@github.com
  - url: >-
      https://github.com/Budibase/budibase/security/advisories/GHSA-ppr4-5f46-j9c6
    label: security-advisories@github.com
  - url: >-
      https://github.com/Budibase/budibase/security/advisories/GHSA-ppr4-5f46-j9c6
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00243
epssPercentile: 0.15733
ingestedAt: '2026-08-15T21:29:27.351Z'
---

## Overview

Budibase is an open-source low-code platform. Prior to 3.40.1, packages/server/src/integrations/mongodb.ts passed builder-controlled tlsCertificateKeyFile and tlsCAFile values directly to MongoClient on Budibase Cloud. A builder could submit absolute server paths through /api/datasources/verify and distinguish readable existing files from missing files by comparing the driver error, exposing a filesystem existence and readability oracle on the shared server. This issue is fixed in version 3.40.1.

## Remediation

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