CVE-2019-16535

CRITICALNVD 9.89.8—

9.8

In all versions of ClickHouse before 19.14, an OOB read, OOB write and integer underflow in decompression algorithms can be used to achieve RCE or DoS via native protocol.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 80.1%
KEV: Not listed

Published

December 30, 2019

Last Modified

June 25, 2025

References (2)

browser-security@yandex-teamhttps://clickhouse.yandex/docs/en/security_changelog/
af854a3a-2127-422b-91ae-364da2661108https://clickhouse.yandex/docs/en/security_changelog/

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 8× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-23 03:25 UTCEG score recompute
2026-05-23 03:25 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2019-16535?

CVE-2019-16535 is a critical vulnerability published on December 30, 2019. In all versions of ClickHouse before 19.14, an OOB read, OOB write and integer underflow in decompression algorithms can be used to achieve RCE or DoS via native protocol.

When was CVE-2019-16535 disclosed?

CVE-2019-16535 was first published in the National Vulnerability Database on December 30, 2019, with the most recent update on June 25, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2019-16535 actively exploited?

CVE-2019-16535 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 80.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2019-16535?

CVE-2019-16535 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2019-16535?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-16535, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2019-16535

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CVE-2019-16535

📅 Published

🔄 Last Modified

🔗 References (2)