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pypi / pyopenssl

pyopenssl

What changed in pyopenssl 26, from its official release notes, upgrade guides and advisories. Sources checked 2026-10-27.

2 security

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pyopenssl 262 changes

Security 2

  • pyOpenSSL allows TLS connection bypass via unhandled callback exception in set_tlsext_servername_callback

    26.0.0security advisory

  • pyOpenSSL DTLS cookie callback buffer overflow

    26.0.0security advisory