CVE-2026-73409

Medium

Description

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.

SeverityMedium

CVSS5.1

Exploit probability—

Product@budibase/server

PublishedAug 12, 2026

First seenAug 12, 2026

Weakness typeCWE-203CWE-203

How to fix

Patches

github.com/Budibase/budibase/security/advisories/GHSA-ppr4-5f46-j9c6

Affected products

Product	Affected versions	Fixed in
@budibase/servernpm	v ≤ 3.38.1	—

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