CVE-2026-111670 clickvisual CVE debrief

Who should care

Defenders responsible for ClickVisual instances, particularly those with authenticated low-privileged users, should assess exposure and prioritize remediation. Operators and administrators of ClickVisual should review and verify the affected scope and implement necessary mitigations. Vulnerability management and security teams should track and monitor for potential exploitation and ensure proper authorization checks are in place.

Why it matters

CVE-2026-111670 is a missing authorization vulnerability in ClickVisual's apiv2 Report Module that allows authenticated low-privileged users to access unauthorized ClickHouse instances. Defenders should prioritize verification and remediation to prevent potential data exposure and enumeration of restricted tables.

• Authenticated low-privileged users may access unauthorized ClickHouse instances.
• Attackers may enumerate schemas and infer row counts of restricted tables.
• Defenders need to verify and remediate this vulnerability to prevent potential data exposure.
• Inventory checks and monitoring are necessary to detect potential exploitation.

Technical summary

ClickVisual through 1.1.2 contains a missing authorization vulnerability in the /api/v2/reports handlers. This allows authenticated low-privileged users to access ClickHouse instances they were not granted access to. Attackers can enumerate schemas and infer row counts of restricted tables by manipulating the instance-id parameter in ReportSourceDatabases, ReportSourceTables, ReportTableColumns, and WhereCheckRun.

Defensive priority

Defenders should prioritize verifying and remediating this vulnerability in ClickVisual instances, particularly those exposed to authenticated low-privileged users.

Recommended defensive actions

• Verify ClickVisual instances for version 1.1.2 or earlier and assess exposure to authenticated low-privileged users.
• Implement proper authorization checks for the /api/v2/reports handlers.
• Monitor for suspicious activity related to ReportSourceDatabases, ReportSourceTables, ReportTableColumns, and WhereCheckRun.
• 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.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record and source item provide details on the missing authorization vulnerability in ClickVisual's apiv2 Report Module. However, the corpus does not provide explicit information on exploitation or specific victim impact.

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.