CVE-2026-82239 budibase CVE debrief

Who should care

Defenders responsible for Budibase server administration and security should assess exposure and prioritize verification of server versions and access controls. This includes IT security teams, compliance officers, and system administrators managing Budibase deployments. They should be aware of the potential for low-privilege users to bypass access controls and manipulate restricted data, and take steps to mitigate these risks.

Why it matters

Defenders should care about CVE-2026-82239 because it allows low-privilege users to bypass access controls and manipulate restricted data in Budibase servers before version 3.41.3. This requires verification of server versions, restriction of access to the datasources/query endpoint, and monitoring for suspicious activity.

• Potential unauthorized data access or modification
• Bypass of table-level access controls
• Elevation of privileges for low-privilege users
• Possible data manipulation or deletion

Technical summary

The Budibase server before version 3.41.3 fails to enforce per-table role restrictions on the POST /api/datasources/query endpoint. This allows low-privilege BASIC users to bypass table-level access controls and manipulate restricted data. The vulnerability is specific to the datasources/query endpoint and impacts Budibase deployments with BASIC user roles. Defenders should prioritize verifying Budibase server versions and restricting access to the datasources/query endpoint to prevent unauthorized data access or modification.

Defensive priority

Defenders should prioritize verifying Budibase server versions and restricting access to the datasources/query endpoint.

Recommended defensive actions

• Verify Budibase server versions and ensure they are up-to-date with version 3.41.3 or later.
• Restrict access to the datasources/query endpoint for low-privilege BASIC users.
• Monitor for suspicious activity on the Budibase server, especially related to data access or modification.
• Implement compensating controls for exposed systems while remediation is scheduled and verified.
• Conduct an exposure review to identify and prioritize affected deployments.
• Perform asset inventory to track Budibase server instances and their current versions.
• Track exceptions and retest remediated assets to ensure the vulnerability is fully resolved.

Evidence notes

The CVE record and source item provide details on the vulnerability, including its description, CVSS score of 8.6, and affected versions before 3.41.3. The source item Budibase before 3.41.3 Authorization Bypass via datasources/query confirms the vulnerability's existence. Defenders should verify Budibase server versions and restrict access to the datasources/query endpoint. Evidence is limited to public CVE and source item details.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.