chore(deps): update dependency pyopenssl to v26

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
pyOpenSSL (source)	==25.3.0 → ==26.2.0

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Release Notes

pyca/pyopenssl (pyOpenSSL)

v26.2.0

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Backward-incompatible changes:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

• Removed deprecated OpenSSL.crypto.X509Extension, OpenSSL.crypto.X509Req.add_extension, OpenSSL.crypto.X509Req.get_extensions, OpenSSL.crypto.X509.add_extension, OpenSSL.crypto.X509.get_extensions. cryptography.x509 should be used instead.
• It is now an error to calling any mutating method on OpenSSL.SSL.Context after it has been used to create a Connection. This was previously deprecated and has always been unsafe.

Deprecations:
^^^^^^^^^^^^^

Changes:
^^^^^^^^

• Maximum supported cryptography version is now 48.x.
• Added OpenSSL.SSL.Connection.set_options to set options on a per-connection basis.

v26.1.0

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Backward-incompatible changes:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Deprecations:
^^^^^^^^^^^^^

Changes:
^^^^^^^^

• Maximum supported cryptography version is now 47.x.
• Fixed X509Name field setters to correctly pass the value length to OpenSSL. Previously, values containing NUL bytes would be silently truncated, causing a divergence between the stored ASN.1 value and the value visible from Python. Credit to BudongJW for reporting the issue. CVE-2026-40475

v26.0.0

Compare Source

Backward-incompatible changes:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

• Dropped support for Python 3.7.
• The minimum cryptography version is now 46.0.0.

Deprecations:
^^^^^^^^^^^^^

Changes:
^^^^^^^^

• Added support for using aws-lc instead of OpenSSL.
• Properly raise an error if a DTLS cookie callback returned a cookie longer than DTLS1_COOKIE_LENGTH bytes. Previously this would result in a buffer-overflow. Credit to dark_haxor for reporting the issue. CVE-2026-27459
• Added OpenSSL.SSL.Connection.get_group_name to determine which group name was negotiated.
• Context.set_tlsext_servername_callback now handles exceptions raised in the callback by calling sys.excepthook and returning a fatal TLS alert. Previously, exceptions were silently swallowed and the handshake would proceed as if the callback had succeeded. Credit to Leury Castillo for reporting this issue. CVE-2026-27448

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