Python 3.13.1 Release Candidate News Jun 2026

Upgraded libexpat to 2.6.4 to resolve CVE-2024-50602 and addressed issues in the ipaddress and venv modules.

Developers can download the 3.13.1 RC from the official Python website or via the python.org FTP server. For those using pyenv , the version is available as 3.13.1rc1 . Testing should focus on: python 3.13.1 release candidate news

The release notes explicitly state that no new features will be added before the final release; thus, the RC is safe to treat as a proxy for the upcoming stable version. Upgraded libexpat to 2

For most Python users, the release candidate serves as a warning and an opportunity. Production environments should never run RC builds, but staging and testing systems can use this version to verify compatibility with existing codebases. Organizations that adopted Python 3.13.0 for early performance gains may have encountered subtle bugs—3.13.1 RC offers a preview of the fixes that will soon be available. Testing should focus on: The release notes explicitly