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VULNERABILITIES

CVE-2026-34073 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/pyca/cryptography/security/advisories/GHSA-m959-cc7f-wv43 [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-295Improper Certificate Validation[email protected]

Affected Products

ProductVersions
cryptography.io cryptography
< 46.0.6

CPE

  • cpe:2.3:a:cryptography.io:cryptography:*:*:*:*:*:python:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-34073
NVD Published Date:
Mar 31, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-34073 Details - Not Deferred