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Medium severity5.3NVD Advisory· Published Mar 31, 2026· Updated Apr 6, 2026

CVE-2026-34073

CVE-2026-34073

Description

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Prior to version 46.0.6, DNS name constraints were only validated against SANs within child certificates, and not the "peer name" presented during each validation. Consequently, cryptography would allow a peer named bar.example.com to validate against a wildcard leaf certificate for *.example.com, even if the leaf's parent certificate (or upwards) contained an excluded subtree constraint for bar.example.com. This issue has been patched in version 46.0.6.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
cryptographyPyPI
< 46.0.646.0.6

Affected products

72

Patches

Vulnerability mechanics

References

4

News mentions

0

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