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Vulnerability record · CVE-2023-48704 · published 22 December 2023

CVE-2023-48704: Clickhouse classic buffer overflow vulnerability

Clickhouse · Clickhouse

ClickHouse is an open-source column-oriented database management system that allows generating analytical data reports in real-time. A heap buffer overflow issue was discovered in ClickHouse server. An attacker could send a specially crafted payload to the native interface exposed by default on port 9000/tcp, triggering a bug in the decompression logic of Gorilla codec that crashes the ClickHouse server process. This attack does not require authentication. This issue has been addressed in ClickHouse Cloud version 23.9.2.47551 and ClickHouse versions 23.10.5.20, 23.3.18.15, 23.8.8.20, and 23.9.6.20.

7.5 CVSS 3.1 High EPSS 0.50% · top 57.0% CWE-120 · Classic buffer overflowCWE-122 · Heap-based buffer overflow
7.5CVSS 3.1 base score
0.50%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

ClickHouse is an open-source column-oriented database management system that allows generating analytical data reports in real-time. A heap buffer overflow issue was discovered in ClickHouse server. An attacker could send a specially crafted payload to the native interface exposed by default on port 9000/tcp, triggering a bug in the decompression logic of Gorilla codec that crashes the ClickHouse server process. This attack does not require authentication. This issue has been addressed in ClickHouse Cloud version 23.9.2.47551 and ClickHouse versions 23.10.5.20, 23.3.18.15, 23.8.8.20, and 23.9.6.20.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

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

References

LinkTags
https://github.com/ClickHouse/ClickHouse/pull/57107 Patch
https://github.com/ClickHouse/ClickHouse/security/advisories/GHSA-5rmf-5g48-xv63 Vendor Advisory
https://github.com/ClickHouse/ClickHouse/pull/57107 Patch
https://github.com/ClickHouse/ClickHouse/security/advisories/GHSA-5rmf-5g48-xv63 Vendor Advisory

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2023-48704), CISA KEV, FIRST EPSS (scores of 2026-11-12). This page is refreshed as NVD updates the record.