Is CVE-2023-47118 actively exploited?

No active exploitation of CVE-2023-47118 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-47118 be exploited remotely?

Yes. CVE-2023-47118 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-47118?

CVE-2023-47118 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2023-47118

CRITICAL

CVE-2023-47118

CWE-122Published: December 20, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official 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 T64 codec that crashes the ClickHouse server process. This attack does not require authentication. Note that this exploit can also be triggered via HTTP protocol, however, the attacker will need a valid credential as the HTTP authentication take places first. This issue has been fixed in version 23.10.2.13-stable, 23.9.4.11-stable, 23.8.6.16-lts and 23.3.16.7-lts.

NVD Source

Technical Analysis

CVE-2023-47118 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.