Vulnerability Description
User-controlled header names and values containing newlines can allow injecting HTTP headers.
Related Weaknesses (CWE)
References
- https://github.com/python/cpython/commit/22e4d55285cee52bc4dbe061324e5f30bd4dee5
- https://github.com/python/cpython/commit/23e3c0ae867cca0130e441e776c9955b9027c51
- https://github.com/python/cpython/commit/286e3ac39984fe85a17f4ab39c64d382137aae5
- https://github.com/python/cpython/commit/2f840249550e082dc351743f474ba56da10478d
- https://github.com/python/cpython/commit/4802b96a2cde58570c24c13ef3289490980961c
- https://github.com/python/cpython/commit/66da7bf6fe7b81e3ecc9c0a25bd47d4616c8d1a
- https://github.com/python/cpython/commit/83ecd18779f286d872f68bfce175651e407d9ff
- https://github.com/python/cpython/commit/8bb044d29310bb05d15086cdaa8bf64867d61a9
- https://github.com/python/cpython/commit/bfba660085767f8c2d582134e9d511a85eda04c
- https://github.com/python/cpython/commit/c592227ffb48679af9845a45dbb0875d975bb21
- https://github.com/python/cpython/commit/e4846a93ac07a8ae9aa18203af0dd13d6e7a699
- https://github.com/python/cpython/commit/f7fceed79ca1bceae8dbe5ba5bc8928564da721
- https://github.com/python/cpython/issues/143916
- https://github.com/python/cpython/pull/143917
- https://mail.python.org/archives/list/[email protected]/thread/BJ6QPH
FAQ
What is CVE-2026-0865?
CVE-2026-0865 is a documented vulnerability. User-controlled header names and values containing newlines can allow injecting HTTP headers.
How severe is CVE-2026-0865?
CVSS scoring is not yet available for CVE-2026-0865. Check NVD for updates.
Is there a patch for CVE-2026-0865?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.