What’s Vulnerable › Vulnerabilities

CVE-2019-15024

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-12-30 · updated 2026-06-17

Description

In all versions of ClickHouse before 19.14.3, an attacker having write access to ZooKeeper and who is able to run a custom server available from the network where ClickHouse runs, can create a custom-built malicious server that will act as a ClickHouse replica and register it in ZooKeeper. When another replica will fetch data part from the malicious replica, it can force clickhouse-server to write to arbitrary path on filesystem.

Affected products

• ClickHouse: before 19.14.3 — fixed in 19.14.3

How to fix

Upgrade to a fixed version: ClickHouse 19.14.3. Check the vendor advisory for mitigations.

References

• https://clickhouse.yandex/docs/en/security_changelog/
• https://clickhouse.yandex/docs/en/security_changelog/

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