---
id: CVE-2026-116366
title: Unauthenticated RCE vulnerability against ClickHouse Server
summary: >-
  An issue has been discovered in ClickHouse Server that, under certain
  conditions, could allow an unauthenticated user with network access to execute
  arbitrary code on the ClickHouse Server.
severity: critical
cvss: 9.5
cvssVector: 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'
cvssSource: cna
cwe:
  - CWE-190
vendor: ClickHouse
product: ClickHouse
affected:
  - ClickHouse >= 26.3 < 26.3.62.3-lts
  - ClickHouse >= 26.8 < 26.8.36.3-lts
  - ClickHouse >= 26.9 < 26.9.27.3-stable
  - ClickHouse >= 26.10 < 26.10.3.7-stable
  - ClickHouse >= 25.12 < 25.12.1.1713
  - ClickHouse >= 26.2 < 26.2.1.835
  - ClickHouse >= 26.4 < 26.4.1.2704
  - ClickHouse >= 26.6 < 26.6.1.2439
  - ClickHouse >= 26.8 < 26.8.1.597
  - ClickHouse >= 26.10 < 26.10.2.84
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-30T16:36:22.337339Z'
exploitAvailable: true
published: '2026-10-30'
updated: '2026-10-30'
sourceUpdated: '2026-10-30T16:36:32.335Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116366'
references:
  - url: 'https://github.com/ClickHouse/ClickHouse/blob/master/SECURITY.md'
  - url: 'https://clickhouse.com/docs/resources/changelogs/security-changelog'
tags:
  - cve.org
  - exploit-available
epss: 0.00962
epssPercentile: 0.61738
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/googlesky/CVE-2026-116366'
  nuclei:
    - CVE-2026-116366
  checkedAt: '2026-11-05T16:25:07.447Z'
ingestedAt: '2026-11-05T16:24:31.079Z'
---

## Overview

An issue has been discovered in ClickHouse Server that, under certain conditions, could allow an unauthenticated user with network access to execute arbitrary code on the ClickHouse Server.

## Affected

- `ClickHouse >= 26.3 < 26.3.62.3-lts`
- `ClickHouse >= 26.8 < 26.8.36.3-lts`
- `ClickHouse >= 26.9 < 26.9.27.3-stable`
- `ClickHouse >= 26.10 < 26.10.3.7-stable`
- `ClickHouse >= 25.12 < 25.12.1.1713`
- `ClickHouse >= 26.2 < 26.2.1.835`
- `ClickHouse >= 26.4 < 26.4.1.2704`
- `ClickHouse >= 26.6 < 26.6.1.2439`
- `ClickHouse >= 26.8 < 26.8.1.597`
- `ClickHouse >= 26.10 < 26.10.2.84`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.