{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.3.1"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "42fec420b6d0266a77e1403036ade3b9a7a3f446"
            }
          ],
          "repo": "https://github.com/baserow/baserow",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81335.json"
  },
  "details": "Baserow dispatches an Application Builder data source without acting on the result of its permission check. The dispatch and record-name views in backend/src/baserow/contrib/builder/api/data_sources/views.py are declared with a permission class that admits any caller, so a request carrying no credential reaches the handler. DataSourceService.dispatch_data_sources in backend/src/baserow/contrib/builder/data_sources/service.py then calls check_multiple_permissions without asking it to raise, and neither stores nor examines the mapping of denials it returns, so a denied check leaves execution to continue and the data source is dispatched whatever the caller's identity. The dispatch runs with the integration's own credentials, so an unauthenticated request naming a data source receives the rows and fields that source reads. Identifiers are small integers and can be enumerated. Version 2.3.1 passes raise_exception to the same call.",
  "id": "CVE-2026-81335",
  "modified": "2026-08-29T03:31:00.703840839Z",
  "published": "2026-08-27T14:50:42.684Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://baserow.io"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81335.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-81335"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/baserow-before-2.3.1-unauthenticated-data-disclosure-via-discarded-permission-check-on-builder-data-sources"
    },
    {
      "type": "FIX",
      "url": "https://github.com/bram2w/baserow/blob/2.3.1/backend/src/baserow/contrib/builder/data_sources/service.py"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/bram2w/baserow"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/bram2w/baserow/blob/2.3.0/backend/src/baserow/contrib/builder/data_sources/service.py"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Baserow before 2.3.1 Unauthenticated Data Disclosure via Discarded Permission Check on Builder Data Sources"
}