Vulnerability in Python Software Foundation Cpython

CVE-2025-11468

When folding a long comment in an email header containing exclusively unfoldable characters, the parenthesis would not be preserved. This could be used for injecting headers into email messages where addresses are user-controlled and not sanitized.

Vulnerability class: CRLF Injection

EPSS: 0.005 (42.8th percentile) — read the EPSS interpretation.