PYSEC-2026-665
See a problem?- Import Source
- https://github.com/pypa/advisory-database/blob/main/vulns/mercurial/PYSEC-2026-665.yaml
- JSON Data
- https://api.osv.dev/v1/vulns/PYSEC-2026-665
- Aliases
- Published
- 2026-07-02T14:13:17.606556Z
- Modified
- 2026-07-06T08:00:38.849597485Z
- Severity
-
- 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
- Summary
- Mercurial Improper Certificate Validation vulnerability
- Details
-
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.
- References
-
- https://nvd.nist.gov/vuln/detail/CVE-2010-4237
- https://github.com/dscho/hg/commit/4ea63fb25ceeeaaa4cd1026f733b7ea7672c30b3
- https://github.com/dscho/hg/commit/89baabf4fb7abf30ef6fdcf3d455a7893e5cc145
- 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://repo.mercurial-scm.org/hg/rev/6ab4a7d3c179
- https://repo.mercurial-scm.org/hg/rev/f2937d6492c5
- https://security-tracker.debian.org/tracker/CVE-2010-4237
- https://pypi.org/project/mercurial
- https://github.com/advisories/GHSA-7gf7-7wx4-mxmw
Affected packages
PyPI / mercurial
Package
- Name
- mercurial
- View open source insights on deps.dev
- Purl
- pkg:pypi/mercurial
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed1.6.4