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Back to active CVEs
Critical · CVSS 9.5CVE-2026-116366

Unauthenticated RCE vulnerability against ClickHouse ServerCVE-2026-116366

Answer in brief

CVE-2026-116366 records a Critical severity (CVSS 9.5) vulnerability in Unauthenticated RCE vulnerability against ClickHouse Server. The current sources do not mark it as known exploited. The current feed maps ClickHouse/ClickHouse (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 30, 2026Updated Oct 30, 2026Source checked Oct 30, 2026First seen by HOL Oct 30, 2026Material review Oct 30, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.5
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 9.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps ClickHouse/ClickHouse (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
ClickHouse/ClickHousegeneric*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for ClickHouse/ClickHouse.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Oct 30, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 30, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 30, 2026

Sources and claim methodology

  • Source referenceclickhouse.com
  • GitHub security advisorygithub.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-190
Source
CVE List V5
Source checked
Oct 30, 2026
References
2 linked sources
Open source record