{"cve":"CVE-2020-26759","nvd":{"published":"2021-01-06T13:15:13.783","modified":"2026-06-17T03:08:20.287","status":"Modified","description":"clickhouse-driver before 0.1.5 allows a malicious clickhouse server to trigger a crash or execute arbitrary code (on a database client) via a crafted server response, due to a buffer overflow.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-120"],"references":["https://github.com/mymarilyn/clickhouse-driver/commit/3e990547e064b8fca916b23a0f7d6fe8c63c7f6b","https://github.com/mymarilyn/clickhouse-driver/commit/d708ed548e1d6f254ba81a21de8ba543a53b5598","https://github.com/mymarilyn/clickhouse-driver/commit/3e990547e064b8fca916b23a0f7d6fe8c63c7f6b","https://github.com/mymarilyn/clickhouse-driver/commit/d708ed548e1d6f254ba81a21de8ba543a53b5598"],"products":["clickhouse-driver_project:clickhouse-driver"],"source":"nvd","synced_at":"2026-10-19T21:12:09.559580076+00:00"},"epss":{"cve":"CVE-2020-26759","score":0.0269,"percentile":0.85876,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-vgv5-cxvh-vfxh","url":"https://osv.dev/vulnerability/GHSA-vgv5-cxvh-vfxh","summary":"Arbitrary code execution in clickhouse-driver","modified":"2025-02-15T05:29:12.929414Z","packages":[{"ecosystem":"PyPI","name":"clickhouse-driver","purl":"pkg:pypi/clickhouse-driver","ranges":["<0.1.5"],"fixed":["0.1.5"]}]},{"id":"PYSEC-2021-61","url":"https://osv.dev/vulnerability/PYSEC-2021-61","summary":"","modified":"2023-12-06T01:00:28.835555Z","packages":[{"ecosystem":"PyPI","name":"clickhouse-driver","purl":"pkg:pypi/clickhouse-driver","ranges":["<0.1.5"],"fixed":["0.1.5"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}