Sourced from pymongo's releases.

PyMongo 4.15.1

Community notes: https://www.mongodb.com/community/forums/t/pymongo-4-15-1-released/328837

PyMongo 4.15.0

Community notes: https://www.mongodb.com/community/forums/t/pymongo-4-15-released/328574

PyMongo 4.14.1

Community notes: https://www.mongodb.com/community/forums/t/pymongo-4-14-1-released/327511

PyMongo 4.14.0

Community notes: https://www.mongodb.com/community/forums/t/pymongo-4-14-released/326906

Sourced from pymongo's changelog.

Changes in Version 4.15.1 (2025/09/16)

Version 4.15.1 is a bug fix release.

• Fixed a bug in :meth:~pymongo.synchronous.encryption.ClientEncryption.encrypt and :meth:~pymongo.asynchronous.encryption.AsyncClientEncryption.encrypt that would cause a TypeError when using pymongocrypt<1.16 by passing an unsupported type_opts parameter even if Queryable Encryption text queries beta was not used.

• Fixed a bug in AsyncMongoClient that caused a ServerSelectionTimeoutError when used with uvicorn, FastAPI, or uvloop.

Issues Resolved ...............

See the PyMongo 4.15.1 release notes in JIRA_ for the list of resolved issues in this release.

.. _PyMongo 4.15.1 release notes in JIRA: https://jira.mongodb.org/secure/ReleaseNote.jspa?projectId=10004&version=46486

Changes in Version 4.15.0 (2025/09/10)

PyMongo 4.15 brings a number of changes including:

• Added :class:~pymongo.encryption_options.TextOpts, :attr:~pymongo.encryption.Algorithm.TEXTPREVIEW, :attr:~pymongo.encryption.QueryType.PREFIXPREVIEW, :attr:~pymongo.encryption.QueryType.SUFFIXPREVIEW, :attr:~pymongo.encryption.QueryType.SUBSTRINGPREVIEW, as part of the experimental Queryable Encryption text queries beta. pymongocrypt>=1.16 is required for text query support.
• Added :class:bson.decimal128.DecimalEncoder and :class:bson.decimal128.DecimalDecoder to support encoding and decoding of BSON Decimal128 values to decimal.Decimal values using the TypeRegistry API.
• Added support for Windows arm64 wheels.

Changes in Version 4.14.1 (2025/08/19)

Version 4.14.1 is a bug fix release.

• Fixed a bug in MongoClient.append_metadata() and AsyncMongoClient.append_metadata() that allowed duplicate DriverInfo.name to be appended to the metadata.

Issues Resolved

... (truncated)

• 8cf6579 PYTHON-5542 Prepare for 4.15.1 Release (#2537)
• 7a07c02 PYTHON-5544 Revert changes to base protocol layer (#2535)
• eca38b7 Bump mypy from 1.17.1 to 1.18.1 (#2532)
• 32e183b Bump the actions group with 3 updates (#2531)
• 3da6e85 PYTHON-5543 PyMongoBaseProtocol should inherit from asyncio.BaseProtocol (#2528)
• 2b14886 PYTHON-5540 Fix usage of text_opts for older versions of pymongocrypt (#2525)
• 527cbdd PYTHON-5537 Update typing dependencies (#2524)
• 8879f2b Bump the actions group with 5 updates (#2519)
• d2653ee BUMP 4.16.0.dev0
• 1514e9b Prepare 4.15 release (#2523)
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