CVE-2026-116366: Unauthenticated RCE vulnerability against ClickHouse Server
Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.
Generated by VEDAS. Scores as of 2026-11-04 15:41 UTC. Rebuilt every few hours from cve-scores, CISA KEV and vedas-signatures. How this works and its limits.
What it is
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.
Description quoted from the CVE record (assigned by ClickHouse, published 2026-10-30).
Weakness: CWE-190 Integer overflow or wraparound
How it can be exploited
Exploitable over the network with high attack complexity with no special attack requirements needing no privileges and no user interaction. Impact: confidentiality high, integrity high, availability high. 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
CISA assessment (SSVC): CISA has no evidence of exploitation. Automatable: no. Technical impact: total.
Public exploit evidence (Exploit Observer)
Exploit Observer found 1 Nuclei template and 1 code repository naming this CVE.
Code repositories that name a CVE are often scanners, copies or fakes, and some are malware. Read the code before running anything.
See all 6 references on Exploit Observer
Live scores
- EPSS
- 0.010
low predicted chance of attack - VEDAS
- 0.979
strong exploit evidence - On CISA KEV
- Not listed
- Detection rule
- No public rule yet
Who is affected
| Product | Affected | Not affected |
|---|---|---|
| ClickHouse | from 26.3 before 26.3.62.3-lts from 26.8 before 26.8.36.3-lts from 26.9 before 26.9.27.3-stable from 26.10 before 26.10.3.7-stable | Not stated |
| ClickHouse Cloud | from 25.12 before 25.12.1.1713 from 26.2 before 26.2.1.835 from 26.4 before 26.4.1.2704 from 26.6 before 26.6.1.2439 from 26.8 before 26.8.1.597 from 26.10 before 26.10.2.84 | Not stated |
Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.
How to fix it
Fixed versions stated in the CVE record: 26.3.62.3-lts, 26.8.36.3-lts, 26.9.27.3-stable, 26.10.3.7-stable, 25.12.1.1713, 26.2.1.835, 26.4.1.2704, 26.6.1.2439, 26.8.1.597, 26.10.2.84.
How to detect it
There is no open VEDAS detection rule for this bug yet. It is listed on the detection gaps page if CISA has confirmed attacks.
References
Other references
- https://github.com/ClickHouse/ClickHouse/blob/master/SECURITY.md
- https://clickhouse.com/docs/resources/changelogs/security-changelog
Other databases
Where this comes from
This advisory is generated automatically by VEDAS from: CVE.org record, cve-scores (EPSS and VEDAS), Exploit Observer. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.
Supporting partners
