Vulnerability · Published Aug 27, 2026 · Assigned by GRAFANA
CVE-2026-19854CVE-2026-19854 CVE Record
Medium 6.1
In plain English
A medium-severity security flaw in Clickhouse Datasource from Grafana. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 0% of all known vulnerabilities).
Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)<0.1%top 99.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Grafana | Clickhouse Datasource | 3.1.0 – through 4.20.0 |
Weakness: CWE-319 · Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
References
- https://grafana.com/security/security-advisories/cve-2026-19854 vendor-advisory