CVE-2026-1502

Description

CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.

References

• https://github.com/python/cpython/commit/05ed7ce7ae9e17c23a04085b2539fe6d6d3cef69
• https://github.com/python/cpython/issues/146211
• https://github.com/python/cpython/pull/146212
• https://mail.python.org/archives/list/security-announce@python.org/thread/2IVPAEQWUJBCTQZEJEVTYCIKSMQPGRZ3/