CVE-2026-73409

What it is

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.

At a glance

Exploitability

Can be exploited over the network with an admin-level account. Limited direct impact.

Exploit odds

0.3% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-08-12 20:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-09-08 20:56 UTC Last updatedMost recent change to the record

Details

Published

2026-08-12 20:17 UTC

Last modified

2026-09-08 20:56 UTC

Exploit probability

0.3% · EPSS, next 30 days

Weakness

CWE-203

Record status

Deferred

Attack profile CVSS 4.0 · 5.1

Attack vector

Network

Complexity

Low

Attack requirements

None

Privileges needed

High

User interaction

None

Confidentiality

Low

Integrity

None

Availability

None