CVE-2026-73618 budibase CVE debrief

Who should care

Budibase Server administrators and users, MongoDB administrators, Security teams responsible for patching and vulnerability management, and operators of Budibase Server instances should prioritize patching to prevent potential NoSQL injection attacks. Additionally, security teams should review compensating controls for exposed systems while remediation is scheduled and verified, and track exceptions, retest remediated assets, and close the item only after evidence is documented. IT teams managing Budibase Server deployments should assess their exposure and implement additional security controls, such as input validation and sanitization, to minimize potential impact. Vulnerability management teams should also verify patch deployment and monitor for suspicious activity in MongoDB query execution logs.

Technical summary

The Budibase Server before version 3.40.0 contains a NoSQL injection vulnerability in the MongoDB query execution endpoint. User-supplied parameters are interpolated into JSON query templates without proper sanitization of JSON metacharacters, allowing attackers with query write permission to inject JSON structural characters and alter MongoDB queries. This vulnerability can be mitigated by applying the patch to upgrade Budibase Server to version 3.40.0 or later, restricting query write permissions to trusted users and services, and monitoring MongoDB query execution logs for suspicious activity.

Defensive priority

Organizations using Budibase Server before version 3.40.0 should prioritize patching to prevent potential NoSQL injection attacks.

Recommended defensive actions

• Apply the patch to upgrade Budibase Server to version 3.40.0 or later
• Restrict query write permissions to trusted users and services
• Monitor MongoDB query execution logs for suspicious activity
• Implement additional security controls, such as input validation and sanitization
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE description indicates a NoSQL injection vulnerability in Budibase Server before 3.40.0, allowing attackers with query write permission to inject JSON structural characters and alter MongoDB queries. However, details about the vulnerability's impact and affected versions are limited. Further verification is needed to determine the full scope of affected systems and potential exposure. Defenders should review MongoDB query execution logs for suspicious activity and verify patch deployment.

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.