What is CVE-2019-16536?

CVE-2019-16536 is a high-severity vulnerability in Clickhouse, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2025-05-21.

How severe is CVE-2019-16536?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Clickhouse

CVE-2019-16536

Stack overflow leading to DoS can be triggered by a malicious authenticated client in Clickhouse before 19.14.3.3.

Vulnerability class: Buffer Overflow

EPSS: 0.007 (51.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Clickhouse
Clickhouse Db — versions 19.14.3.3

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

browser-security@yandex-team.ru (Release Notes)

Frequently asked questions

What is CVE-2019-16536?: CVE-2019-16536 is a high-severity vulnerability in Clickhouse, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2025-05-21.
How severe is CVE-2019-16536?: High severity. CVSS v3 base score is 8.8 out of 10.