Bug 2431374 (CVE-2026-0672)

Summary: CVE-2026-0672 cpython: Header injection in http.cookies.Morsel in Python
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: bbrownin, dfreiber, drow, gotiwari, jburrell, jgrulich, jhorak, ljawale, luizcosta, mvyas, nweather, rbobbitt, teagle, tpopela, vkumar
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
An injection flaw has been discovered in Python. 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.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2431749, 2431757, 2431803, 2431814, 2431844, 2431846, 2431751, 2431753, 2431762, 2431765, 2431770, 2431787, 2431792, 2431794, 2431799, 2431809, 2431817, 2431820, 2431824, 2431828, 2431833, 2431837, 2431840    
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Description OSIDB Bzimport 2026-01-20 22:02:40 UTC
User-controlled cookie values and parameters can allow injecting HTTP headers. Fix rejects all control characters within cookie names, values, and parameters.

Comment 6 errata-xmlrpc 2026-04-27 14:54:23 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:10950 https://access.redhat.com/errata/RHSA-2026:10950