[ACTION REQUIRED] Protobuf C++ and python users, please update to our latest release

[Samuel Benzaquen]

Hello everyone,

If you are using protobuf-cpp or protobuf-python, please update to our latest releases, published Sept 14. The pypi package has also been updated.
More information about this advisory can be found here:
https://github.com/protocolbuffers/protobuf/security/advisories/GHSA-8gq9-2x98-w8hf

Thanks!
- Samuel on behalf of the Protobuf Team