CVE-2026-81335
High · CVSS 8.7Published 2026-08-27
CVSS
8.7
High
EPSS
—
exploit probability
Active Exploit
No
not yet listed
What is CVE-2026-81335?
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.
CVSS Score Explained
CVSS 8.7 is High severity. Exploitation is likely straightforward and the impact is significant — data loss, privilege escalation, or remote code execution are common outcomes. Patch as soon as possible.
EPSS Exploitation Probability
No EPSS score yet — model needs more data on this CVE.
References & Patches
- ›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
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