cpython security

The cpython security tag on WindowsForum.com covers vulnerabilities and security issues in the CPython implementation of Python, particularly as they affect Windows environments. Recent discussions focus on CVE-2026-1502, a medium-severity CR/LF injection flaw in Python's HTTP client proxy tunneling code. This vulnerability allows carriage-return and line-feed characters in tunnel host and header values, potentially enabling HTTP request smuggling. The tag explores practical implications for Windows administrators and developers, emphasizing the need to audit internal tooling, automation scripts, and services that pass untrusted input to Python's proxy-tunnel setup. Recurring themes include standard-library security, proxy negotiation, CONNECT tunnels, and the importance of treating assumed-safe plumbing code as a potential attack surface.