Bug 2431765

Summary:	CVE-2026-0672 python3.10: Header injection in http.cookies.Morsel in Python [fedora-42]
Product:	[Fedora] Fedora	Reporter:	Jon Moroney <jmoroney>
Component:	python3.10	Assignee:	Python Maintainers <python-maint>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	42	CC:	cstratak, mhroncok, python-maint, python-packagers-sig, thrnciar, torsava, vstinner
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["d18422dd-5b98-4e4f-a87e-e0fd0de5585f"]}
Fixed In Version:	python3.10-3.10.20-1.fc42	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-03-15 01:12:53 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2431374

Description Jon Moroney 2026-01-21 20:24:45 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

Comment 1 Fedora Update System 2026-03-06 10:32:36 UTC

FEDORA-2026-66ae29ad2c (python3.10-3.10.20-1.fc42) has been submitted as an update to Fedora 42.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-66ae29ad2c

Comment 2 Fedora Update System 2026-03-07 01:58:29 UTC

FEDORA-2026-66ae29ad2c has been pushed to the Fedora 42 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-66ae29ad2c`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-66ae29ad2c

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 3 Fedora Update System 2026-03-15 01:12:53 UTC

FEDORA-2026-66ae29ad2c (python3.10-3.10.20-1.fc42) has been pushed to the Fedora 42 stable repository.
If problem still persists, please make note of it in this bug report.