{"cve":"CVE-2010-4237","nvd":{"published":"2019-10-29T19:15:12.720","modified":"2026-06-16T23:24:24.847","status":"Modified","description":"Mercurial before 1.6.4 fails to verify the Common Name field of SSL certificates which allows remote attackers who acquire a certificate signed by a Certificate Authority to perform a man-in-the-middle attack.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","score":5.9},"cwes":["CWE-295"],"references":["https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=598841","https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2010-4237","https://bz.mercurial-scm.org/show_bug.cgi?id=2407","https://security-tracker.debian.org/tracker/CVE-2010-4237","https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=598841"],"products":["mercurial:mercurial"],"source":"nvd","synced_at":"2026-10-19T20:59:25.448946135+00:00"},"epss":{"cve":"CVE-2010-4237","score":0.00821,"percentile":0.57306,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-7gf7-7wx4-mxmw","url":"https://osv.dev/vulnerability/GHSA-7gf7-7wx4-mxmw","summary":"Mercurial Improper Certificate Validation vulnerability","modified":"2026-07-06T08:11:12.037621418Z","packages":[{"ecosystem":"PyPI","name":"mercurial","purl":"pkg:pypi/mercurial","ranges":["<1.6.4"],"fixed":["1.6.4"]}]},{"id":"PYSEC-2026-665","url":"https://osv.dev/vulnerability/PYSEC-2026-665","summary":"Mercurial Improper Certificate Validation vulnerability","modified":"2026-07-06T08:00:38.849597485Z","packages":[{"ecosystem":"PyPI","name":"mercurial","purl":"pkg:pypi/mercurial","ranges":["<1.6.4"],"fixed":["1.6.4"]}]}],"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."]}