CVE-2026-0672

medium

Description

When using http.cookies.Morsel, user-controlled cookie values and parameters can allow injecting HTTP headers into messages. Patch rejects all control characters within cookie names, values, and parameters.

References

https://mail.python.org/archives/list/[email protected]/thread/6VFLQQEIX673KXKFUZXCUNE5AZOGZ45M/

https://github.com/python/cpython/pull/143920

https://github.com/python/cpython/issues/143919

https://github.com/python/cpython/commit/95746b3a13a985787ef53b977129041971ed7f70

Details

Source: Mitre, NVD

Published: 2026-01-20

Updated: 2026-01-20

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 9.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Severity: Critical

CVSS v4

Base Score: 6

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N