CVE-2026-82240 budibase CVE debrief

Who should care

Budibase administrators, security teams, and developers responsible for maintaining Budibase installations should assess and remediate this vulnerability. These stakeholders should prioritize assessment and remediation to prevent potential unauthorized access to sensitive data or systems. Additionally, operators and platform administrators may need to review and restrict app-scoped builder role assignments to prevent exploitation.

Why it matters

CVE-2026-82240 is a high-severity vulnerability in Budibase server versions before 3.41.3 that allows an authenticated app-scoped builder to escalate privileges and gain unauthorized builder access to other applications in the same tenant via the user update API. Budibase administrators and security teams should prioritize assessment and remediation of this vulnerability.

• Potential unauthorized access to sensitive data or systems
• Elevation of privileges for attackers
• Compromise of Budibase installations
• Lateral movement within the tenant

Technical summary

Budibase server versions before 3.41.3 are vulnerable to privilege escalation via the user update API. An authenticated app-scoped builder can exploit this issue to gain unauthorized builder access to other applications in the same tenant. The vulnerability exists due to insufficient validation of app-scoped builder role assignments in the public user create and update endpoints. This allows attackers to submit crafted requests to the user update API with builder.apps fields to escalate privileges. Budibase administrators and security teams should prioritize assessment and remediation of this vulnerability.

Defensive priority

Budibase administrators and security teams should prioritize assessment and remediation of this vulnerability.

Recommended defensive actions

• Assess Budibase server versions for vulnerability
• Update Budibase server to version 3.41.3 or later
• Monitor user update API activity for suspicious requests
• Review and restrict app-scoped builder role assignments
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and source item provide details on the vulnerability, including its description, CVSS score, and affected versions. The CVE record was published on 2026-08-28T10:49:28.683Z and has not been modified since then. The source item provides additional context on the vulnerability. However, the exact scope of affected systems and potential impact is limited by the information available in the CVE record and source item. Defenders should verify the affected versions and review the vendor advisory for specific guidance.

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.