PYSEC-2026-665

vendorUSosv

Mercurial Improper Certificate Validation vulnerability

view advisory published 2026-07-02Licence: CC-BY-4.0

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.

01

describes (1)

Related CVEs.

IDseverity exploitable
CVE-2010-4237USmedium5.9—
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 perfor…
02

references

External citations — patches, advisories, analysis.

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