CVE-2026-0865
User-controlled header names and values containing newlines can allow injecting HTTP headers.
02 / AFFECTED SOFTWARE
Affected packages
215 explicit affected versions
400 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
User-controlled header names and values containing newlines can allow injecting HTTP headers.
User-controlled header names and values containing newlines can allow injecting HTTP headers.
User-controlled header names and values containing newlines can allow injecting HTTP headers.
User-controlled header names and values containing newlines can allow injecting HTTP headers.
User-controlled header names and values containing newlines can allow injecting HTTP headers.
05 / REFERENCES
Further evidence
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/0xxx/CVE-2026-0865.json
- https://github.com/python/cpython/commit/22e4d55285cee52bc4dbe061324e5f30bd4dee58
- https://github.com/python/cpython/commit/23e3c0ae867cca0130e441e776c9955b9027c510
- https://github.com/python/cpython/commit/286e3ac39984fe85a17f4ab39c64d382137aae5f
- https://github.com/python/cpython/commit/2f840249550e082dc351743f474ba56da10478d2
- https://github.com/python/cpython/commit/4802b96a2cde58570c24c13ef3289490980961c5
- https://github.com/python/cpython/commit/66da7bf6fe7b81e3ecc9c0a25bd47d4616c8d1a6
- https://github.com/python/cpython/commit/83ecd18779f286d872f68bfce175651e407d9fff
- https://github.com/python/cpython/commit/8bb044d29310bb05d15086cdaa8bf64867d61a97
- https://github.com/python/cpython/commit/bfba660085767f8c2d582134e9d511a85eda04cf
- https://github.com/python/cpython/commit/c592227ffb48679af9845a45dbb0875d975bb219
- https://github.com/python/cpython/commit/e4846a93ac07a8ae9aa18203af0dd13d6e7a6995
- https://github.com/python/cpython/commit/f7fceed79ca1bceae8dbe5ba5bc8928564da7211
- https://github.com/python/cpython/issues/143916
- https://github.com/python/cpython/pull/143917
- https://mail.python.org/archives/list/[email protected]/thread/BJ6QPHNSHJTS3A7CFV6IBMCAP2DWRVNT/
- https://nvd.nist.gov/vuln/detail/CVE-2026-0865