Improper Certificate Validation Affecting mercurial package, versions <1.6.4-1


Severity

Recommended
low

Based on Debian security rating.

Threat Intelligence

EPSS
0.82% (55th percentile)

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  • Snyk IDSNYK-DEBIAN14-MERCURIAL-11760564
  • published10 Aug 2025
  • disclosed29 Oct 2019

Introduced: 29 Oct 2019

CVE-2010-4237  (opens in a new tab)
CWE-295  (opens in a new tab)

How to fix?

Upgrade Debian:14 mercurial to version 1.6.4-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mercurial package and not the mercurial package as distributed by Debian. See How to fix? for Debian:14 relevant fixed versions and status.

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 Base Scores

version 3.1