CVE-2026-0865

N/A Unknown

Published: January 20, 2026 Modified: March 03, 2026

View on NVD

Description

User-controlled header names and values containing newlines can allow injecting HTTP headers.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://github.com/python/cpython/commit/22e4d55285cee52bc4dbe061324e5f30bd4dee58

Source: cna@python.org

https://github.com/python/cpython/commit/23e3c0ae867cca0130e441e776c9955b9027c510

Source: cna@python.org

https://github.com/python/cpython/commit/286e3ac39984fe85a17f4ab39c64d382137aae5f

Source: cna@python.org

https://github.com/python/cpython/commit/2f840249550e082dc351743f474ba56da10478d2

Source: cna@python.org

https://github.com/python/cpython/commit/4802b96a2cde58570c24c13ef3289490980961c5

Source: cna@python.org

https://github.com/python/cpython/commit/66da7bf6fe7b81e3ecc9c0a25bd47d4616c8d1a6

Source: cna@python.org

https://github.com/python/cpython/commit/83ecd18779f286d872f68bfce175651e407d9fff

Source: cna@python.org

https://github.com/python/cpython/commit/8bb044d29310bb05d15086cdaa8bf64867d61a97

Source: cna@python.org

https://github.com/python/cpython/commit/bfba660085767f8c2d582134e9d511a85eda04cf

Source: cna@python.org

https://github.com/python/cpython/commit/c592227ffb48679af9845a45dbb0875d975bb219

Source: cna@python.org

https://github.com/python/cpython/commit/e4846a93ac07a8ae9aa18203af0dd13d6e7a6995

Source: cna@python.org

https://github.com/python/cpython/commit/f7fceed79ca1bceae8dbe5ba5bc8928564da7211

Source: cna@python.org

https://github.com/python/cpython/issues/143916

Source: cna@python.org

https://github.com/python/cpython/pull/143917

Source: cna@python.org

https://mail.python.org/archives/list/security-announce@python.org/thread/BJ6QPHNSHJTS3A7CFV6IBMCAP2DWRVNT/

Source: cna@python.org

15 reference(s) from NVD

Quick Stats

CVSS v3 Score

N/A / 10.0

EPSS (Exploit Probability)

0.1%

33th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-74

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