Name: CVE-2026-0672: Improper Neutralization of CRLF Sequences
Creator: Rapid7
Published: 2026-01-20T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-0672, CVSS 6, EPSS 0.00081

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.

CVSS Details

CVSS 4.0 Base Score: 6 (MEDIUM)
CVSS 4.0 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Alma_linux	—	Upgrade python3.12-tkinterUpgrade python3.12-libsUpgrade python3.12-develUpgrade python3.12-debugUpgrade python3.12Upgrade python3.12-idleUpgrade python3.12-testUpgrade python3.12-rpm-macros	Apr 29, 2026	Apr 27, 2026
Amazon Linux Ami 2	—	Upgrade python-toolsUpgrade python-debugUpgrade python3Upgrade python3-libsUpgrade python3-tkinterUpgrade python-develUpgrade python3-develUpgrade python3-debugUpgrade python3-debuginfoUpgrade python-debuginfoUpgrade python-libsUpgrade python3-toolsUpgrade python3-testUpgrade python-testUpgrade pythonUpgrade tkinter	May 20, 2026	May 20, 2026
Amazon_linux_2023	—	Upgrade python3.12-debuginfoUpgrade python3.14-freethreading-tkinterUpgrade python3-idleUpgrade python3.13-debugsourceUpgrade python3.9-debugsourceUpgrade python3.14-debugsourceUpgrade python3.14-freethreading-testUpgrade python3.12Upgrade python3.14-freethreading-idleUpgrade python3.11-debugUpgrade python3.12-tkinterUpgrade python3.14-freethreadingUpgrade python3-tkinterUpgrade python3-develUpgrade python3-libsUpgrade python3-testUpgrade python3.14-testUpgrade python3-debugUpgrade python3.11Upgrade python3.14Upgrade python3.14-debuginfoUpgrade python3.11-develUpgrade python3.14-tkinterUpgrade python3.9-debuginfoUpgrade python3.13Upgrade python3.13-freethreadingUpgrade python3.12-testUpgrade python3.12-idleUpgrade python3.12-libsUpgrade python3.13-develUpgrade python3.13-testUpgrade python3.13-freethreading-debugUpgrade python3.12-develUpgrade python3.14-freethreading-develUpgrade python3.11-tkinterUpgrade python3.11-testUpgrade python3.14-debugUpgrade python3.13-libsUpgrade python3.11-debugsourceUpgrade python3.11-debuginfoUpgrade python3.14-idleUpgrade python3.14-develUpgrade python3.11-libsUpgrade python3.14-libsUpgrade python3.14-freethreading-libsUpgrade python-unversioned-commandUpgrade python3.13-debugUpgrade python3.12-debugUpgrade python3.13-idleUpgrade python3.13-tkinterUpgrade python3.12-debugsourceUpgrade python3.11-idleUpgrade python3.13-debuginfoUpgrade python3Upgrade python3.14-freethreading-debug	Feb 20, 2026	Jan 20, 2026
Debian	—	Upgrade python3.9Upgrade python3.13Upgrade python3.11	Jan 27, 2026	Jan 27, 2026
Ibm Aix	—	Apply the fix or workaround for python_advisory21	Sep 15, 2026	Sep 15, 2026
Oracle_linux	—	Upgrade python3.12Upgrade python3.12-tkinterUpgrade python3-debugUpgrade python3.12-libsUpgrade python3Upgrade python3-testUpgrade python3.12-debugUpgrade python3.12-develUpgrade python3.12-idleUpgrade python3-tkinterUpgrade python3-develUpgrade python3-idleUpgrade python3.12-rpm-macrosUpgrade python3.12-testUpgrade python-unversioned-commandUpgrade python3-libs	Apr 29, 2026	Jan 20, 2026
Redhat_linux	—	Upgrade python3.12-tkinterUpgrade python3-tkinterUpgrade python3.12-debuginfoUpgrade python3-testUpgrade python3-idleUpgrade python3-develUpgrade python3.12-rpm-macrosUpgrade python3-libsUpgrade python3.12-libsUpgrade python3.12Upgrade python3.12-debugsourceUpgrade python3.12-develUpgrade python3-debugUpgrade python3.12-idleUpgrade python3Upgrade python-unversioned-commandNo solution existsUpgrade python3.12-debugUpgrade python3.12-test	Apr 29, 2026	Jan 20, 2026
Rocky_linux	—	Upgrade python3-testUpgrade python3.12-tkinterUpgrade python3-tkinterUpgrade python3Upgrade python3.12-debugUpgrade python3.12Upgrade python3-debugUpgrade python3.12-debuginfoUpgrade python3.12-libsUpgrade python3.12-debugsourceUpgrade python3-idleUpgrade python3.12-testUpgrade python3-develUpgrade python3.12-develUpgrade python3.12-idleUpgrade python3-libs	Apr 29, 2026	Apr 28, 2026
Suse	—	Upgrade python313-base-x86-64-v3Upgrade python312-dbmUpgrade libpython3_4m1_0-32bitUpgrade python312-docUpgrade python312-develUpgrade python311-baseUpgrade python311-32bitUpgrade python310-docUpgrade python310-baseUpgrade python3-idleUpgrade python3-cursesUpgrade python39-toolsUpgrade python313-nogil-cursesUpgrade python313-idleUpgrade python313Upgrade libpython3_9-1_0-32bitUpgrade python39-develUpgrade python36-baseUpgrade python312-idleUpgrade python3-baseUpgrade python313-tkUpgrade python-base-32bitUpgrade libpython3_11-1_0Upgrade python39-dbmUpgrade python311-toolsUpgrade python-idleUpgrade libpython3_12-1_0-32bitUpgrade python311-dbmUpgrade python-gdbmUpgrade python312-testsuiteUpgrade python311-base-32bitUpgrade python-32bitUpgrade libpython3_13-1_0-x86-64-v3Upgrade python312-base-32bitUpgrade python311-docUpgrade python311Upgrade python3-toolsUpgrade python3-develUpgrade python-doc-pdfUpgrade python313-nogil-toolsUpgrade python-develUpgrade python313-develUpgrade python-demoUpgrade libpython2_7-1_0Upgrade python36-develUpgrade python313-nogil-baseUpgrade python310-tkUpgrade python39-cursesUpgrade python313-nogilUpgrade python310-32bitUpgrade python-baseUpgrade libpython3_13-1_0Upgrade python3Upgrade python3-tkUpgrade python39-32bitUpgrade python310-dbmUpgrade python3-doc-devhelpUpgrade python39-testsuiteUpgrade python313-nogil-testsuiteUpgrade python39Upgrade python310-idleUpgrade pythonUpgrade python310-doc-devhelpUpgrade python313-x86-64-v3Upgrade python3-dbmUpgrade python-xmlUpgrade python311-tkUpgrade python310-toolsUpgrade python3-testsuiteUpgrade libpython3_9-1_0Upgrade libpython3_11-1_0-32bitUpgrade python39-docUpgrade python36Upgrade python310Upgrade libpython3_12-1_0Upgrade python311-develUpgrade python310-cursesUpgrade python313-doc-devhelpUpgrade python312-baseUpgrade python312Upgrade python313-docUpgrade python313-dbmUpgrade python313-testsuiteUpgrade python-cursesUpgrade libpython3_4m1_0Upgrade libpython3_10-1_0Upgrade python39-base-32bitUpgrade libpython3_10-1_0-32bitUpgrade libpython2_7-1_0-32bitUpgrade python39-tkUpgrade python313-nogil-idleUpgrade python313-nogil-dbmUpgrade python313-cursesUpgrade python312-32bitUpgrade python312-tkUpgrade python311-idleUpgrade python3-docUpgrade libpython3_13t1_0Upgrade python39-idleUpgrade python313-nogil-tkUpgrade python312-toolsUpgrade python312-cursesUpgrade python39-doc-devhelpUpgrade python39-baseUpgrade python311-testsuiteUpgrade python310-testsuiteUpgrade libpython3_6m1_0Upgrade python311-cursesUpgrade python310-develUpgrade python310-base-32bitUpgrade python-tkUpgrade python-docUpgrade python313-nogil-develUpgrade python312-doc-devhelpUpgrade python311-doc-devhelpUpgrade python313-toolsUpgrade python313-baseUpgrade libpython3_6m1_0-32bit	Feb 23, 2026	Feb 20, 2026
Ubuntu	—	Upgrade libpython3.9-minimal (Ubuntu Pro)Upgrade libpython3.6-stdlib (Ubuntu Pro)Upgrade libpython3.8-minimal (Ubuntu Pro)Upgrade python3.11-examples (Ubuntu Pro)Upgrade python3.8 (Ubuntu Pro)Upgrade python3.6-doc (Ubuntu Pro)Upgrade libpython3.12-minimalUpgrade python3.9-minimal (Ubuntu Pro)Upgrade libpython3.12-stdlibUpgrade python3.5-dev (Ubuntu Pro)Upgrade libpython3.4-testsuite (Ubuntu Pro)Upgrade python3.10-devUpgrade python3.6-venv (Ubuntu Pro)Upgrade libpython3.5 (Ubuntu Pro)Upgrade python3.5-venv (Ubuntu Pro)Upgrade python3.8-minimal (Ubuntu Pro)Upgrade python3.8-venv (Ubuntu Pro)Upgrade python3.14-nopieUpgrade python3.11-full (Ubuntu Pro)Upgrade libpython3.12-testsuiteUpgrade python3.5-doc (Ubuntu Pro)Upgrade libpython3.11-stdlib (Ubuntu Pro)Upgrade idle-python3.12Upgrade libpython3.10-devUpgrade libpython3.10Upgrade python3.12-devUpgrade python3.12-examplesUpgrade libpython3.5-minimal (Ubuntu Pro)Upgrade python3.12-venvUpgrade python3.14Upgrade idle-python3.11 (Ubuntu Pro)Upgrade idle-python3.4 (Ubuntu Pro)Upgrade python3.10-docUpgrade libpython3.14-stdlibUpgrade libpython3.10-testsuiteUpgrade python3.11-nopie (Ubuntu Pro)Upgrade libpython3.14-testsuiteUpgrade python3.7-minimal (Ubuntu Pro)Upgrade libpython3.14-devUpgrade python3.13Upgrade python3.12-docUpgrade libpython3.7-testsuite (Ubuntu Pro)Upgrade libpython3.9-dev (Ubuntu Pro)Upgrade libpython3.7-stdlib (Ubuntu Pro)Upgrade python3.4-examples (Ubuntu Pro)Upgrade libpython3.7-minimal (Ubuntu Pro)Upgrade python3.7-dev (Ubuntu Pro)Upgrade libpython3.10-minimalUpgrade libpython3.5-testsuite (Ubuntu Pro)Upgrade libpython3.4 (Ubuntu Pro)Upgrade libpython3.12-devUpgrade python3.14-docUpgrade python3.6-examples (Ubuntu Pro)Upgrade python3.13-examplesUpgrade python3.5-examples (Ubuntu Pro)Upgrade libpython3.6 (Ubuntu Pro)Upgrade python3.4-minimal (Ubuntu Pro)Upgrade libpython3.8-testsuite (Ubuntu Pro)Upgrade libpython3.11-testsuite (Ubuntu Pro)Upgrade python3.11-dev (Ubuntu Pro)Upgrade libpython3.11-minimal (Ubuntu Pro)Upgrade python3.4 (Ubuntu Pro)Upgrade libpython3.8-stdlib (Ubuntu Pro)Upgrade libpython3.14Upgrade idle-python3.6 (Ubuntu Pro)Upgrade python3.12Upgrade libpython3.13Upgrade python3.12-fullUpgrade libpython3.6-dev (Ubuntu Pro)Upgrade python3.12-minimalUpgrade python3.13-minimalUpgrade python3.12-nopieUpgrade python3.10-nopieUpgrade python3.4-venv (Ubuntu Pro)Upgrade python3.5-minimal (Ubuntu Pro)Upgrade python3.4-dev (Ubuntu Pro)Upgrade idle-python3.10Upgrade python3.14-gdbmUpgrade libpython3.13-devUpgrade python3.7-doc (Ubuntu Pro)Upgrade idle-python3.14Upgrade python3.8-full (Ubuntu Pro)Upgrade python3.14-fullUpgrade python3.13-devUpgrade libpython3.9-stdlib (Ubuntu Pro)Upgrade libpython3.13-stdlibUpgrade python3.10-venvUpgrade libpython3.11 (Ubuntu Pro)Upgrade libpython3.6-minimal (Ubuntu Pro)Upgrade libpython3.4-minimal (Ubuntu Pro)Upgrade python3.5 (Ubuntu Pro)Upgrade libpython3.12t64Upgrade python3.10-examplesUpgrade python3.13-nopieUpgrade python3.13-venvUpgrade python3.10-fullUpgrade libpython3.13-minimalUpgrade python3.7-examples (Ubuntu Pro)Upgrade python3.6-dev (Ubuntu Pro)Upgrade python2.7 (Ubuntu Pro)Upgrade libpython3.8-dev (Ubuntu Pro)Upgrade idle-python3.9 (Ubuntu Pro)Upgrade python3.14-devUpgrade libpython3.9 (Ubuntu Pro)Upgrade python3.10Upgrade python3.4-doc (Ubuntu Pro)Upgrade libpython3.4-stdlib (Ubuntu Pro)Upgrade libpython3.4-dev (Ubuntu Pro)Upgrade libpython3.11-dev (Ubuntu Pro)Upgrade python3.13-docUpgrade python3.14-minimalUpgrade python3.13-fullUpgrade libpython3.13-testsuiteUpgrade python3.6-minimal (Ubuntu Pro)Upgrade python3.6 (Ubuntu Pro)Upgrade python3.11 (Ubuntu Pro)Upgrade libpython3.8 (Ubuntu Pro)Upgrade idle-python3.5 (Ubuntu Pro)Upgrade idle-python3.8 (Ubuntu Pro)Upgrade libpython3.6-testsuite (Ubuntu Pro)Upgrade python3.9-full (Ubuntu Pro)Upgrade python3.9-doc (Ubuntu Pro)Upgrade python3.14-examplesUpgrade libpython3.10-stdlibUpgrade python3.11-venv (Ubuntu Pro)Upgrade idle-python3.7 (Ubuntu Pro)Upgrade python3.9 (Ubuntu Pro)Upgrade python3.11-doc (Ubuntu Pro)Upgrade libpython3.5-stdlib (Ubuntu Pro)Upgrade libpython2.7 (Ubuntu Pro)Upgrade python3.7-venv (Ubuntu Pro)Upgrade libpython3.5-dev (Ubuntu Pro)Upgrade python3.14-venvUpgrade idle-python3.13Upgrade python3.9-dev (Ubuntu Pro)Upgrade python3.9-examples (Ubuntu Pro)Upgrade python3.8-doc (Ubuntu Pro)Upgrade libpython3.7-dev (Ubuntu Pro)Upgrade libpython3.7 (Ubuntu Pro)Upgrade python3.9-venv (Ubuntu Pro)Upgrade libpython3.14-minimalUpgrade libpython3.9-testsuite (Ubuntu Pro)Upgrade python3.11-minimal (Ubuntu Pro)Upgrade python3.10-minimalUpgrade python3.7 (Ubuntu Pro)Upgrade python3.14-tkUpgrade python3.13-gdbmUpgrade python3.13-tkUpgrade python3.8-examples (Ubuntu Pro)Upgrade python3.8-dev (Ubuntu Pro)	Feb 6, 2026	Jan 20, 2026
Vmware Photon_os	—	Use 'tdnf update' to upgrade all packages to the latest version.	May 27, 2026	Jan 20, 2026

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CVSS Details

Covered by Rapid7

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