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Vulnerability record · CVE-2019-16536 · published 21 May 2025

CVE-2019-16536: Clickhouse classic buffer overflow vulnerability

Clickhouse · Clickhouse

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

8.2 CVSS 4.0 High EPSS 0.90% · top 39.8% CWE-120 · Classic buffer overflow
8.2CVSS 4.0 base score
0.90%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

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

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://clickhouse.com/docs/whats-new/security-changelog Release Notes

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.2CVE-2026-111497Google brotli unchecked return value vulnerabilityA buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) in Google Brotli versions 1.0.3 through 1.2.0 on all platforms allows a remote…KEVEPSS 83%9.8CVE-2023-47118Clickhouse heap-based buffer overflow vulnerabilityClickHouse® is an open-source column-oriented database management system that allows generating analytical data reports in real-time. A heap buffer o…EPSS 0.46%9.8CVE-2019-16535Clickhouse out-of-bounds read vulnerabilityIn all versions of ClickHouse before 19.14, an OOB read, OOB write and integer underflow in decompression algorithms can be used to achieve RCE or Do…EPSS 1.7%9.8CVE-2018-14671Clickhouse improper input validation vulnerabilityIn ClickHouse before 18.10.3, unixODBC allowed loading arbitrary shared objects from the file system which led to a Remote Code Execution vulnerabili…EPSS 3.4%9.8CVE-2018-14670Clickhouse improper authorization vulnerabilityIncorrect configuration in deb package in ClickHouse before 1.1.54131 could lead to unauthorized use of the database.EPSS 1.8%8.8CVE-2021-43304Clickhouse heap-based buffer overflow vulnerabilityHeap buffer overflow in Clickhouse's LZ4 compression codec when parsing a malicious query. There is no verification that the copy operations in the L…EPSS 1.7%8.8CVE-2021-43305Clickhouse heap-based buffer overflow vulnerabilityHeap buffer overflow in Clickhouse's LZ4 compression codec when parsing a malicious query. There is no verification that the copy operations in the L…EPSS 1.7%8.8CVE-2018-14668Clickhouse cross-site request forgery vulnerabilityIn ClickHouse before 1.1.54388, "remote" table function allowed arbitrary symbols in "user", "password" and "default_database" fields which led to Cr…EPSS 0.72%

Source: NIST National Vulnerability Database (record CVE-2019-16536), CISA KEV, FIRST EPSS (scores of 2026-11-11). This page is refreshed as NVD updates the record.