Sourced from cryptography's changelog.

47.0.0 - 2026-04-24

* Support for Python 3.8 is deprecated and will be removed in the next
  ``cryptography`` release.
* **BACKWARDS INCOMPATIBLE:** Support for binary elliptic curves
  (``SECT*`` classes) has been removed. These curves are rarely used and
  have additional security considerations that make them undesirable.
* **BACKWARDS INCOMPATIBLE:** Support for OpenSSL 1.1.x has been removed.
  OpenSSL 3.0.0 or later is now required. LibreSSL, BoringSSL, and AWS-LC
  continue to be supported.
* **BACKWARDS INCOMPATIBLE:** Dropped support for LibreSSL < 4.1.
* **BACKWARDS INCOMPATIBLE:** Loading keys with unsupported algorithms or
  keys with unsupported explicit curve encodings now raises
  :class:`~cryptography.exceptions.UnsupportedAlgorithm` instead of
  ``ValueError``. This change affects
  :func:`~cryptography.hazmat.primitives.serialization.load_pem_private_key`,
  :func:`~cryptography.hazmat.primitives.serialization.load_der_private_key`,
  :func:`~cryptography.hazmat.primitives.serialization.load_pem_public_key`,
  :func:`~cryptography.hazmat.primitives.serialization.load_der_public_key`,
  and :meth:`~cryptography.x509.Certificate.public_key` when called on
  certificates with unsupported public key algorithms.
* **BACKWARDS INCOMPATIBLE:** When parsing elliptic curve private keys, we now
  reject keys that incorrectly encode a private key of the wrong length because
  such keys are impossible to process in a constant-time manner. We do not
  believe keys with this problem are in wide use, however we may revert this
  change based on the feedback we receive.
* Deprecated passing 64-bit (8-byte) and 128-bit (16-byte) keys to
  :class:`~cryptography.hazmat.decrepit.ciphers.algorithms.TripleDES`. In a
  future release, only 192-bit (24-byte) keys will be accepted. Users should
  expand shorter keys themselves (e.g., for single DES: ``key + key + key``,
  for two-key: ``key + key[:8]``).
* Updated the minimum supported Rust version (MSRV) to 1.83.0, from 1.74.0.
* Support for ``x86_64`` macOS (including publishing wheels) is deprecated
  and will be removed in the next release. We will switch to publishing an
  ``arm64`` only wheel for macOS.
* Support for 32-bit Windows (including publishing wheels) is deprecated
  and will be removed in the next release. Users should move to a 64-bit
  Python installation.
* ``public_bytes`` and ``private_bytes`` methods on keys now raise
  ``TypeError`` (instead of ``ValueError``) if an invalid encoding is provided
  for the given ``format``.
* Moved :class:`~cryptography.hazmat.decrepit.ciphers.modes.CFB`,
  :class:`~cryptography.hazmat.decrepit.ciphers.modes.OFB`, and
  :class:`~cryptography.hazmat.decrepit.ciphers.modes.CFB8` into
  :doc:`/hazmat/decrepit/index` and deprecated them in the ``modes`` module.
  They will be removed from the ``modes`` module in 49.0.0.
* Moved :class:`~cryptography.hazmat.primitives.ciphers.algorithms.Camellia`
  into  :doc:`/hazmat/decrepit/index` and deprecated it in the ``cipher`` module.
  It will be removed from the ``cipher`` module in 49.0.0.
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... (truncated)

• 59c5f5e bump for 47.0.0 release (#14730)
• 9025578 Add MLKEM1024-P384 hybrid KEM support in HPKE (#14722)
• ef66de4 Recommend Argon2id over PBKDF2HMAC as KDF (#14724)
• d996a37 Add ubuntu-resolute to CI workflow (#14729)
• e86da41 chore(deps): bump libc from 0.2.185 to 0.2.186 (#14725)
• 1c33c9a Bump downstream dependencies in CI (#14728)
• 67fb6be Bump x509-limbo and/or wycheproof in CI (#14727)
• 6cb20b3 Bump BoringSSL, OpenSSL, AWS-LC in CI (#14726)
• d6f372d Update supported OpenSSL versions in installation docs (#14721)
• ebd2619 openssl 3.3 is out of upstream support (#14720)
• Additional commits viewable in compare view