{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "3.40.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "e58aa31e18272f6a1a8aeb525b7eef0b01b1dd43"
            },
            {
              "fixed": "0450f48467d426a4cde0a9fb6f85fc6aed6850df"
            }
          ],
          "repo": "https://github.com/budibase/budibase",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-ppr4-5f46-j9c6"
  ],
  "database_specific": {
    "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"
  },
  "details": "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.",
  "id": "CVE-2026-73409",
  "modified": "2026-09-10T03:30:39.936284307Z",
  "published": "2026-08-12T19:19:59.492Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/Budibase/budibase/releases/tag/3.40.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/Budibase/budibase/security/advisories/GHSA-ppr4-5f46-j9c6"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73409.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73409"
    },
    {
      "type": "FIX",
      "url": "https://github.com/Budibase/budibase/commit/e58aa31e18272f6a1a8aeb525b7eef0b01b1dd43"
    },
    {
      "type": "FIX",
      "url": "https://github.com/Budibase/budibase/pull/19244"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Budibase: Server Filesystem Existence/Read Oracle via Builder-Controlled MongoDB tlsCertificateKeyFile"
}