# CVE-2026-19854

## Summary

- **CVE ID:** CVE-2026-19854
- **Severity:** MEDIUM
- **CVSS Score:** 6.1 (CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N)
- **CWE:** CWE-319
- **Published:** Aug 27, 2026
- **Last Modified:** Aug 27, 2026

## Description

When the ClickHouse plugin uses Native protocol (the default) with PDC or secure SOCKS, it asks for TLS but the connection library ignores that and talks to ClickHouse in the clear. Username, password, queries, and results can be read on the hop after the proxy. The server certificate is never checked, and a configured client certificate is not sent.

## Affected Products

- Grafana — Clickhouse Datasource (3.1.0)

## References

- [CNA](https://grafana.com/security/security-advisories/cve-2026-19854)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.05%
- **EPSS Percentile:** 0.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._