# CVE-2021-3547: OpenVPN 3 Core library 3.6 and 3.6.1 possible certificate authentication bypass with `--verify-x509-name`
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# CVE-2021-3547: OpenVPN 3 Core library 3.6 and 3.6.1 possible certificate authentication bypass with --verify-x509-name
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OpenVPN 3 Core Library version 3.6 and 3.6.1 allows a man-in-the-middle attacker to bypass the certificate authentication by issuing an unrelated server certificate using the same hostname found in the `verify-x509-name` option in a client configuration.
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OpenVPN 3 Core Library version 3.6 and 3.6.1 allows a man-in-the-middle attacker to bypass the certificate authentication by issuing an unrelated server certificate using the same hostname found in the verify-x509-name option in a client configuration.
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This issue is resolved in OpenVPN 3 Core library 3.6.2, by [commit febf01ef68](https://github.com/OpenVPN/openvpn3/commit/febf01ef68b84f1579684224c80149138b6d2dcc) and [commit 11f964076d](https://github.com/OpenVPN/openvpn3/commit/11f964076d1c8c394f679b00a0242424a98b88d8).
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This issue is resolved in OpenVPN 3 Core library 3.6.2, by [commit febf01ef68](https://github.com/OpenVPN/openvpn3/commit/febf01ef68b84f1579684224c80149138b6d2dcc) and [commit 11f964076d](https://github.com/OpenVPN/openvpn3/commit/11f964076d1c8c394f679b00a0242424a98b88d8).
