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python: cpython: URL parser allowed square brackets in domain names

🗓️ 13 May 2025 08:08:03Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 3 Views

Python urllib.parse accepts square brackets in domain names, violating RFC 3986 and causing differential parsing.

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Red Hat Enterprise Linux10noarchpython-unversioned-command3.12.9-1.el10python-unversioned-command-3.12.9-1.el10.noarch.rpm
Red Hat Enterprise Linux10aarch64python33.12.9-1.el10python3-3.12.9-1.el10.aarch64.rpm
Red Hat Enterprise Linux10ppc64lepython33.12.9-1.el10python3-3.12.9-1.el10.ppc64le.rpm
Red Hat Enterprise Linux10s390xpython33.12.9-1.el10python3-3.12.9-1.el10.s390x.rpm
Red Hat Enterprise Linux10x86_64python33.12.9-1.el10python3-3.12.9-1.el10.x86_64.rpm
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Red Hat Enterprise Linux10s390xpython3-debug3.12.9-1.el10python3-debug-3.12.9-1.el10.s390x.rpm
Red Hat Enterprise Linux10x86_64python3-debug3.12.9-1.el10python3-debug-3.12.9-1.el10.x86_64.rpm
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18 Aug 2026 13:42Current
6.3Medium risk
Vulners AI Score6.3
CVSS 46.3
EPSS0.01525
SSVC
CWE-20
pythonurllib.parseurlspliturlparserfc3986domain-name-parsingdifferential-parsing
3