{"id":"CVE-2026-81335","state":"PUBLISHED","title":"Baserow before 2.3.1 Unauthenticated Data Disclosure via Discarded Permission Check on Builder Data Sources","description":"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.","publishedAt":"2026-08-27T14:50:42.684Z","updatedAt":"2026-08-27T17:59:52.010Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"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","source":"VulnCheck"},"assigner":"VulnCheck","products":["Baserow Baserow"],"affected":[{"vendor":"Baserow","product":"Baserow","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2.3.1","versionType":"semver"}],"collectionURL":"https://github.com/bram2w/baserow","repo":"https://github.com/bram2w/baserow"}],"references":["https://baserow.io","https://github.com/bram2w/baserow","https://github.com/bram2w/baserow/blob/2.3.0/backend/src/baserow/contrib/builder/data_sources/service.py","https://github.com/bram2w/baserow/blob/2.3.1/backend/src/baserow/contrib/builder/data_sources/service.py","https://www.vulncheck.com/advisories/baserow-before-2.3.1-unauthenticated-data-disclosure-via-discarded-permission-check-on-builder-data-sources"],"weaknesses":["CWE-862"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/81xxx/CVE-2026-81335.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-81335","state":"PUBLISHED","datePublished":"2026-08-27T14:50:42.684Z","dateUpdated":"2026-08-27T17:59:52.010Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-08-26T17:44:27.173Z"},"containers":{"cna":{"title":"Baserow before 2.3.1 Unauthenticated Data Disclosure via Discarded Permission Check on Builder Data Sources","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Baserow","product":"Baserow","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2.3.1","versionType":"semver"}],"collectionURL":"https://github.com/bram2w/baserow","repo":"https://github.com/bram2w/baserow"}],"references":[{"url":"https://baserow.io","tags":["product"]},{"url":"https://github.com/bram2w/baserow","tags":["product"]},{"url":"https://github.com/bram2w/baserow/blob/2.3.0/backend/src/baserow/contrib/builder/data_sources/service.py","tags":["technical-description"]},{"url":"https://github.com/bram2w/baserow/blob/2.3.1/backend/src/baserow/contrib/builder/data_sources/service.py","tags":["patch"]},{"url":"https://www.vulncheck.com/advisories/baserow-before-2.3.1-unauthenticated-data-disclosure-via-discarded-permission-check-on-builder-data-sources","name":"VulnCheck Advisory: Baserow before 2.3.1 Unauthenticated Data Disclosure via Discarded Permission Check on Builder Data Sources","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"HIGH","baseScore":8.7,"vectorString":"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"}},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE","version":"3.1","baseSeverity":"HIGH","baseScore":7.5,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"Missing Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-08-27T14:50:42.684Z"},"datePublic":"2026-08-26T00:00:00.000Z","credits":[{"lang":"en","value":"Michael Holmquist","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"},"source":{"discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-27T17:59:45.581465Z","id":"CVE-2026-81335","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-27T17:59:52.010Z"}}]}}}