pyopenssl vulnerabilities

Browse known CVEs and advisories by package and ecosystem. Severity tells you the worst case. What determines real risk is whether the vulnerable code actually runs in your applications.

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CVE-IDSeverityPackage summary

CVE-2026-27459Highpyopenssl: pyOpenSSL DTLS cookie callback buffer overflow CVE-2026-27448Lowpyopenssl: pyOpenSSL allows TLS connection bypass via unhandled callback exception in set_tlsext_servername_callback CVE-2013-4314HighpyOpenSSL: PyOpenSSL Mishandles NUL Byte In Certificate Subject Alternative Name CVE-2018-1000807Highpyopenssl: PyOpenSSL Use-After-Free vulnerability CVE-2018-1000808Highpyopenssl: Pyopenssl Incorrect Memory Management

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