Budibase up to 3.40.0 MongoDB Integration mongodb.ts tlsCertificateKeyFile/tlsCAFile information disclosure

Summaryinfo

A vulnerability labeled as problematic has been found in Budibase up to 3.40.0. Affected by this vulnerability is an unknown functionality of the file packages/server/src/integrations/mongodb.ts of the component MongoDB Integration. Executing a manipulation of the argument tlsCertificateKeyFile/tlsCAFile can lead to information disclosure. The identification of this vulnerability is CVE-2026-73409. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic was found in Budibase up to 3.40.0. This vulnerability affects an unknown part of the file packages/server/src/integrations/mongodb.ts of the component MongoDB Integration. The manipulation of the argument tlsCertificateKeyFile/tlsCAFile with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-73409 since 08/12/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading to version 3.40.1 eliminates this vulnerability.

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Productinfo

Name

• Budibase

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• 3.12
• 3.13
• 3.14
• 3.15
• 3.16
• 3.17
• 3.18
• 3.19
• 3.20
• 3.21
• 3.22
• 3.23
• 3.24
• 3.25
• 3.26
• 3.27
• 3.28
• 3.29
• 3.30
• 3.31
• 3.32
• 3.33
• 3.34
• 3.35
• 3.36
• 3.37
• 3.38
• 3.39
• 3.40.0

Website

• Product: https://github.com/Budibase/budibase/

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