CVE-2026-4519

The webbrowser.open() API would accept leading dashes in the URL which
could be handled as command line options for certain web browsers. New
behavior rejects leading dashes. Users are recommended to sanitize URLs
prior to passing to webbrowser.open().

More information : https://github.com/python/cpython/commit/43fe06b96f6a6cf5cfd5bdab20b8649374956866