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python: cpython: Python: Arbitrary code execution via command injection in webbrowser.open() API

🗓️ 07 May 2026 04:55:03Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 17 Views

Arbitrary code execution via webbrowser.open command injection using %action bypassing mitigation for vulnerability 2026 4519.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.6aarch64python3.110:3.11.11-2.el9_6.7python3.11-0:3.11.11-2.el9_6.7.aarch64.rpm
Red Hat Enterprise Linux9.6ppc64lepython3.110:3.11.11-2.el9_6.7python3.11-0:3.11.11-2.el9_6.7.ppc64le.rpm
Red Hat Enterprise Linux9.6s390xpython3.110:3.11.11-2.el9_6.7python3.11-0:3.11.11-2.el9_6.7.s390x.rpm
Red Hat Enterprise Linux9.6x86_64python3.110:3.11.11-2.el9_6.7python3.11-0:3.11.11-2.el9_6.7.x86_64.rpm
Red Hat Enterprise Linux9.6anypython3.110:3.11.11-2.el9_6.7.i686python3.11-0:3.11.11-2.el9_6.7.i686.noarch.rpm
Red Hat Enterprise Linux9.6aarch64python3.11-debug0:3.11.11-2.el9_6.7python3.11-debug-0:3.11.11-2.el9_6.7.aarch64.rpm
Red Hat Enterprise Linux9.6ppc64lepython3.11-debug0:3.11.11-2.el9_6.7python3.11-debug-0:3.11.11-2.el9_6.7.ppc64le.rpm
Red Hat Enterprise Linux9.6s390xpython3.11-debug0:3.11.11-2.el9_6.7python3.11-debug-0:3.11.11-2.el9_6.7.s390x.rpm
Red Hat Enterprise Linux9.6x86_64python3.11-debug0:3.11.11-2.el9_6.7python3.11-debug-0:3.11.11-2.el9_6.7.x86_64.rpm
Red Hat Enterprise Linux9.6anypython3.11-debug0:3.11.11-2.el9_6.7.i686python3.11-debug-0:3.11.11-2.el9_6.7.i686.noarch.rpm
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06 Jul 2026 05:48Current
6Medium risk
Vulners AI Score6
CVSS 3.13.3 - 7.1
CVSS 47
EPSS0.00308
SSVC
CWE-88
webbrowser opencommand injectionarbitrary code executionvulnerability 2026 4519unix
17