CVE-2026-73409

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 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.

Affected Software

Weaknesses

• CWE-203: CWE-203: Observable Discrepancy

References

• https://github.com/Budibase/budibase/security/advisories/GHSA-ppr4-5f46-j9c6
• https://github.com/Budibase/budibase/pull/19244
• https://github.com/Budibase/budibase/commit/e58aa31e18272f6a1a8aeb525b7eef0b01b1dd43
• https://github.com/Budibase/budibase/releases/tag/3.40.1

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