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CVE-2026-116366critical9.5

Unauthenticated RCE vulnerability against ClickHouse Server

Impact

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.

Source excerpt · ClickHouse
Applies when

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 packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

ClickHouse · ClickHouse

ClickHouse

4 ranges
ClickHouse version evidence
Platforms: x86, arm

Compare with this publisher’s ranges. This does not inspect your installation.

affected

26.3 → before 26.3.62.3-lts

custom versions

26.8 → before 26.8.36.3-lts

custom versions

26.9 → before 26.9.27.3-stable

custom versions

26.10 → before 26.10.3.7-stable

custom versions

unaffected

unknown

Other versions: affected

ClickHouse · ClickHouse

ClickHouse Cloud

6 ranges
ClickHouse version evidence
Platforms: ARM, x86

Compare with this publisher’s ranges. This does not inspect your installation.

affected

25.12 → before 25.12.1.1713

custom versions

26.2 → before 26.2.1.835

custom versions

26.4 → before 26.4.1.2704

custom versions

26.6 → before 26.6.1.2439

custom versions

26.8 → before 26.8.1.597

custom versions

26.10 → before 26.10.2.84

custom versions

unaffected

unknown

Other versions: unaffected

Original 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.

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-116366

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-190 ↗

CWE-190 Integer overflow or wraparound

ClickHouse

Related →
Contributing organizations · 2
ClickHouse

Assigning organization

2026-10-30
CISA-ADP

Additional data publisher

2026-10-30

What changed

Follow changes
  1. CVE · CVE-2026-116366

    Observed 2026-10-30T16:50:14.650Z · upstream updated 2026-10-30T16:36:32.335Z

    Prioritization updated

    before

    []

    after

    [
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-10-30T16:36:22.337339Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "none"
      },
      {
        "name": "Automatable",
        "value": "no"
      },
      {
        "name": "Technical Impact",
        "value": "total"
      }
    ]
  }
]
  2. CVE · CVE-2026-116366

    Observed 2026-10-30T16:40:40.089Z · upstream updated 2026-10-30T14:57:49.817Z

    Product or version evidence changed

    before

    [
  {
    "vendor": "ClickHouse",
    "name": "ClickHouse",
    "platforms": [
      "x86",
      "arm"
    ],
    "versions": [
      {
        "version": "26.3",
        "status": "affected",
        "lessThan": "26.3.62.3-lts",
        "versionType": "custom"
      },
      {
        "version": "26.8",
        "status": "affected",
        "lessThan": "26.8.36.3-lts",
        "versionType": "custom"
      },
      {
        "version": "26.9",
        "status": "affected",
        "lessThan": "26.9.27.3-stable",
        "versionType": "custom"
      },
      {
        "version": "26.10",
        "status": "affected",
        "lessThan": "26.10.3.7-stable",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "affected",
    "cpes": [],
    "source": "ClickHouse",
    "url": "https://www.cve.org/CVERecord?id=CVE-2026-116366"
  }
]

    after

    [
  {
    "vendor": "ClickHouse",
    "name": "ClickHouse",
    "platforms": [
      "x86",
      "arm"
    ],
    "versions": [
      {
        "version": "26.3",
        "status": "affected",
        "lessThan": "26.3.62.3-lts",
        "versionType": "custom"
      },
      {
        "version": "26.8",
        "status": "affected",
        "lessThan": "26.8.36.3-lts",
        "versionType": "custom"
      },
      {
        "version": "26.9",
        "status": "affected",
        "lessThan": "26.9.27.3-stable",
        "versionType": "custom"
      },
      {
        "version": "26.10",
        "status": "affected",
        "lessThan": "26.10.3.7-stable",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "affected",
    "cpes": [],
    "source": "ClickHouse",
    "url": "https://www.cve.org/CVERecord?id=CVE-2026-116366"
  },
  {
    "vendor": "ClickHouse",
    "name": "ClickHouse Cloud",
    "platforms": [
      "ARM",
      "x86"
    ],
    "versions": [
      {
        "version": "25.12",
        "status": "affected",
        "lessThan": "25.12.1.1713",
        "versionType": "custom"
      },
      {
        "version": "26.2",
        "status": "affected",
        "lessThan": "26.2.1.835",
        "versionType": "custom"
      },
      {
        "version": "26.4",
        "status": "affected",
        "lessThan": "26.4.1.2704",
        "versionType": "custom"
      },
      {
        "version": "26.6",
        "status": "affected",
        "lessThan": "26.6.1.2439",
        "versionType": "custom"
      },
      {
        "version": "26.8",
        "status": "affected",
        "lessThan": "26.8.1.597",
        "versionType": "custom"
      },
      {
        "version": "26.10",
        "status": "affected",
        "lessThan": "26.10.2.84",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected",
    "cpes": [],
    "source": "ClickHouse",
    "url": "https://www.cve.org/CVERecord?id=CVE-2026-116366"
  }
]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.

References

2 sources
github.com/ClickHouse/ClickHouse/blob/master/SECURITY.md
Security advisoryClickHouse
clickhouse.com/docs/resources/changelogs/security-changelog
Release notesClickHouse