{"id":"CVE-2026-81335","summary":"Baserow before 2.3.1 Unauthenticated Data Disclosure via Discarded Permission Check on Builder Data Sources","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.","modified":"2026-08-29T03:31:00.703840839Z","published":"2026-08-27T14:50:42.684Z","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"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/baserow/baserow","events":[{"introduced":"0"},{"fixed":"42fec420b6d0266a77e1403036ade3b9a7a3f446"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"fixed":"2.3.1"}]}}],"versions":["2.3.0","2.2.2","2.2.1","2.2.0","2.1.6","2.1.4","2.1.3","2.1.2","2.1.1","2.0.6","2.0.5","2.0.4","2.0.3","2.0.2","2.0.1","2.0.0","1.35.3","1.35.2","1.35.1","1.35.0","1.34.5","1.34.4","1.34.3","1.34.2","1.34.1","1.34.0","1.33.4","1.33.3","1.33.2","1.33.1","1.33.0","1.32.5","1.32.4","1.32.3","1.32.2","1.32.1","1.32.0","1.31.1","1.31.0","1.30.1","1.30.0","1.29.3","1.29.2","1.29.1","1.29.0","1.28.0","1.27.2","1.27.1","1.27.0","1.26.1","1.26.0","1.25.2","1.25.1","1.25.0","1.24.2","1.24.1","1.24.0","1.23.2","1.23.1","1.23.0","1.22.3","1.22.2","1.22.1","1.22.0","1.21.2","1.21.1","1.21.0","1.20.2","1.20.1","1.20.0","1.19.1","1.19.0","1.18.0","1.17.2","1.17.1","1.17.0","1.16.1-rc1","1.16.0","1.15.2","1.15.1","1.15.0","1.14.0","1.13.3","1.13.2","1.13.1","1.13.0","1.12.1","1.12.0","1.11.0","1.10.2","1.10.1","1.10.0","1.9.1","1.9","1.8.3","1.8.2","1.8.1","1.8.0","1.7.1","1.7.0","1.6.0","1.5.0","1.4.3","1.4.2","1.4.1","1.4.0","1.3.0","1.2.0","1.1.0","1.0.1","1.0.0","0.8.0","0.7.1","0.7.0","0.6.0","0.5.0","0.4.0","0.3.1","0.3.0","0.2.0","0.1.0","0.0.2","0.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-81335.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","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"}]}