CVE-2026-116366

An issue has been discovered in ClickHouse Server that, under certain conditions, could allow an…

Risk score: 62/100
CVSS: 9.5 v4.0
Published: 30 Oct 2026

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What to know

What it is: An issue has been discovered in ClickHouse Server that, under certain conditions, could allow an unauthenticated user with network access to execute arbitrary code on the ClickHouse Server.
Affected: See advisory
Fix: Apply the vendor's security update; see the linked advisory.
Exploitation: No known exploitation

Why it is Amber

CVSS 9.5 critical
Remotely exploitable without logging in

References

https://clickhouse.com/docs/resources/changelogs/security-changelog
https://github.com/ClickHouse/ClickHouse/blob/master/SECURITY.md

Original description

An issue has been discovered in ClickHouse Server that, under certain conditions, could allow an unauthenticated user with network access to execute arbitrary code on the ClickHouse Server.

Last activity 30 Oct 2026. Patch Forecast updates every hour.