Vulnerability DatabaseCVE-2026-19854
Mend.io Vulnerability Database
The largest open source vulnerability database
What is a Vulnerability ID?
New vulnerability? Tell us about it!
CVE-2026-19854
Published:August 27, 2026
Updated:August 31, 2026
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 Packages
https://github.com/grafana/clickhouse-datasource.git (GITHUB):
Affected version(s) >=v3.1.0 <v4.21.1
Fix Suggestion:
Update to version v4.21.1
Related Resources (2)
https://grafana.com/security/security-advisories/cve-2026-19854
https://nvd.nist.gov/vuln/detail/CVE-2026-19854
Do you need more information?
Contact Us
CVSS v4
Base Score:
7
Attack Vector
ADJACENT
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.1
Attack Vector
ADJACENT
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Cleartext Transmission of Sensitive Information
CWE-319
EPSS
Base Score:
0.05