mongo-cxx-driver r4.5.2

C++ Driver for MongoDB

Release notes

## Fixed

- Validate key lengths. [CVE-2026-84970](https://www.cve.org/CVERecord?id=CVE-2026-84970)
- Validate before casting length in `from_json`. [CVE-2026-84966](https://www.cve.org/CVERecord?id=CVE-2026-84966)

See the [full list of changes in Jira](https://jira.mongodb.org/issues/?jql=project%20%3D%20CXX%20AND%20fixVersion%20%3D%204.5.2).

## Feedback
To report a bug or request a feature, please open a ticket in the MongoDB issue management tool Jira:

- [Create an account](https://jira.mongodb.org) and login.
- Navigate to the [CXX project](https://jira.mongodb.org/browse/CXX)
- Click `Create`.

## Signature Verification
Release artifacts may be verified by using the accompanying detached signature (.asc) and the cpp-driver public key obtained from https://pgp.mongodb.com.

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