Buffer overflow in ClickHouse DB
Priority MEDIUM 43CWE-120Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.
Summary
Stack overflow leading to DoS can be triggered by a malicious authenticated client in Clickhouse before 19.14.3.3.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00903 59th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| ClickHouse | DB | 19.14.3.3 | — | No fix listed | CNA |
- DB VendorClickHouse Affected 19.14.3.3 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:clickhouse:clickhouse:*:*:*:*:*:*:*:* | before 19.14.3.3 | Vulnerable | ClickHouse |
- cpe:2.3:a:clickhouse:clickhouse:*:*:*:*:*:*:*:* Versions before 19.14.3.3 Vulnerable ·ClickHouse
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2019-16536
- 2026-10-03 Alias added: GHSA-5xwv-wjhm-pv8f
References
More Clickhouse vulnerabilities
- TI-2026-79288 Out-of-bounds write in Google Brotli decoder KEVCVSS 4.0CRITICAL 9.2
- TI-2024-27624 ClickHouse v24.3.3.102 was discovered to contain a buffer overflow via the component DB::evaluateConstantExpressionImpl. CVSS 3.1HIGH 7.5
- TI-2024-14986 ClickHouse's Role-based Access Control is bypassed when query caching is enabled. CVSS 3.1MEDIUM 4.9
- TI-2018-10534 Improper input validation in ClickHouse CVSS 3.0CRITICAL 9.8
- TI-2018-10533 Incorrect configuration in deb package in ClickHouse before 1.1.54131 could lead to unauthorized use of the database. CVSS 3.0CRITICAL 9.8
- TI-2019-12398 Out-of-bounds read in ClickHouse CVSS 3.1CRITICAL 9.8
Sources
- CVE-2019-16536 · CVE Program
- CVE-2019-16536 · NVD
- FIRST EPSS
- GHSA-5xwv-wjhm-pv8f · GitHub Advisory Database · CC BY 4.0
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