---
id: "CVE-2026-111670"
kind: "vulnerability"
aliases: ["CVE-2026-111670"]
title: "ClickVisual: low-privilege users can read ClickHouse schemas they were not granted"
severity: "medium"
cvss: 5.3
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["clickhouse", "clickvisual", "other", "self-hosted"]
not_affected_if: ["auth-required", "single-user-deployment"]
published_at: "2026-10-16T18:17:49+00:00"
first_seen_at: "2026-10-23T21:57:13+00:00"
updated_at: "2026-10-25T04:27:08+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111670", "first_seen_at": "2026-10-23T21:57:13+00:00"}]
---

# ClickVisual: low-privilege users can read ClickHouse schemas they were not granted

ClickVisual through 1.1.2 has a missing authorization check in its /api/v2/reports handlers. An authenticated low-privileged user can change the instance-id parameter to enumerate schemas and infer row counts of ClickHouse tables they were never granted.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the ClickVisual version with the deployed binary or image tag; versions up to `1.1.2` are listed as affected
- Review which users hold low-privilege roles and whether they have access to ClickHouse instances they should not see

## Timeline

- 2026-10-23T21:57:13+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-111670

## From the sources

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

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_