Is there a public exploit for CVE-2026-116366?

Yes. Proof-of-concept code for CVE-2026-116366 has been published publicly.

Is there a proof of concept for CVE-2026-116366?

Yes — 1 proof-of-concept entry is linked on this page, from public repositories and community submissions. They are listed for authorised testing only.

How severe is CVE-2026-116366?

CVE-2026-116366 scores CVSS 9.5 (v4.0), rated critical.

9.5 Critical

An issue has been discovered in ClickHouse Server that, under certain conditions, could allow an unauthenticated user with network access…

CVE-2026-116366

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.

Proof-of-concept code is published

Public PoC · Nuclei template

NucleiClickHouse Server - Brotli v1.2.0 Decoder DoS/OOB-Write
Public PoCgooglesky/CVE-2026-1163662 stars

A Nuclei detection template exists for this, which means it is scanned for at internet scale rather than looked for deliberately.

Signals come from Exploit-DB, Metasploit, Nuclei and published proof-of-concept repositories. Their absence means nothing was found, not that nothing exists.

Assessment

CVSS: 9.5 (v4.0)
Severity: Critical
Known exploited: Not listed in CISA KEV
Exploit availability: Public PoC, Nuclei template
Published: 30 October 2026
Last updated: 30 October 2026
Weakness: CWE-190
Assigner: cb7ba516-3b07-4c98-b0c2-715220f1a8f6

CVSS vectorCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

At the source

References

Community proofs of concept

No community proof of concept yet. If you have one for a published vulnerability and the right to share it, add it below — it will appear here once reviewed.

Submit a proof of concept

Only for publicly disclosed vulnerabilities, and only material from testing you were authorised to perform. This platform does not buy, sell, or broker exploits — see earning from vulnerability research for legitimate bounty programs. Submissions are reviewed before they appear. Text only; do not include live credentials, personal data, or anything targeting systems you are not permitted to test.

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Before you submit * This vulnerability is already publicly disclosed (it has a published CVE). This material comes only from testing I was authorised to perform. I have the legal right to publish this content and am not breaching any agreement by doing so. It contains no live credentials, personal data, or anything targeting systems I am not authorised to test. I understand it will be reviewed before it appears publicly and may be rejected. I agree to the submission terms.

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Query this programmatically

Agents can read this through the MCP endpoint, or over HTTP:

curl https://cve.zerocrew.in/api/cve/CVE-2026-116366