CVE-2019-16536 Stack overflow leading to DoS can be triggered by a malicious authenticated client.
A malicious authenticated client can trigger a stack overflow leading to denial of service in ClickHouse.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-16536?
CVE-2019-16536 is a high-severity denial of service vulnerability in Clickhouse DB, published on 21 May 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Stack overflow leading to DoS can be triggered by a malicious authenticated client in Clickhouse before 19.14.3.3.
Weakness: CWE-120
Which versions are affected by CVE-2019-16536?
It affects 1 product.
Products include Clickhouse Clickhouse.
How do I fix CVE-2019-16536?
No fix has been published for CVE-2019-16536 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2019-16536 being exploited?
There is no known exploitation of CVE-2019-16536 in the wild and no public exploit code.
Other vulnerabilities in Clickhouse DB
Sources
Also known as DEBIAN-CVE-2019-16536, ECHO-b165-83cf-9a1b, GHSA-5xwv-wjhm-pv8f, UBUNTU-CVE-2019-16536.