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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-203"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73409.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "3.40.1"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "e58aa31e18272f6a1a8aeb525b7eef0b01b1dd43"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "3.40.1",
"range": [
{
"fixed": "0450f48467d426a4cde0a9fb6f85fc6aed6850df"
}
],
"source": "REFERENCES_TAG"
}
]
}