CVE-2026-19854 CVE-2026-19854 CVE Record
Attackers can intercept credentials and data in transit because the plugin fails to enforce TLS when using specific proxy configurations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19854?
CVE-2026-19854 is a medium-severity vulnerability in Grafana Clickhouse Datasource, published on 27 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
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.
Weakness: CWE-319
Which versions are affected by CVE-2026-19854?
How do I fix CVE-2026-19854?
No fix has been published for CVE-2026-19854 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-19854 being exploited?
There is no known exploitation of CVE-2026-19854 in the wild and no public exploit code.
Sources
Also known as GHSA-4pgr-wr6g-rxf6.