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python: cpython: Arbitrary writes via tarfile realpath overflow

🗓️ 18 Dec 2025 01:35:54Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 4 Views

Tarfile module flaw allows writes outside extraction directory when extracting untrusted archives.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.9aarch64cython-debugsource0.29.21-5.module+el8.9.0+19644+d68f775dcython-debugsource-0.29.21-5.module+el8.9.0+19644+d68f775d.aarch64.rpm
Red Hat Enterprise Linux8.9ppc64lecython-debugsource0.29.21-5.module+el8.9.0+19644+d68f775dcython-debugsource-0.29.21-5.module+el8.9.0+19644+d68f775d.ppc64le.rpm
Red Hat Enterprise Linux8.9s390xcython-debugsource0.29.21-5.module+el8.9.0+19644+d68f775dcython-debugsource-0.29.21-5.module+el8.9.0+19644+d68f775d.s390x.rpm
Red Hat Enterprise Linux8.9x86_64cython-debugsource0.29.21-5.module+el8.9.0+19644+d68f775dcython-debugsource-0.29.21-5.module+el8.9.0+19644+d68f775d.x86_64.rpm
Red Hat Enterprise Linux8.9aarch64numpy-debugsource1.19.4-3.module+el8.9.0+19644+d68f775dnumpy-debugsource-1.19.4-3.module+el8.9.0+19644+d68f775d.aarch64.rpm
Red Hat Enterprise Linux8.9ppc64lenumpy-debugsource1.19.4-3.module+el8.9.0+19644+d68f775dnumpy-debugsource-1.19.4-3.module+el8.9.0+19644+d68f775d.ppc64le.rpm
Red Hat Enterprise Linux8.9s390xnumpy-debugsource1.19.4-3.module+el8.9.0+19644+d68f775dnumpy-debugsource-1.19.4-3.module+el8.9.0+19644+d68f775d.s390x.rpm
Red Hat Enterprise Linux8.9x86_64numpy-debugsource1.19.4-3.module+el8.9.0+19644+d68f775dnumpy-debugsource-1.19.4-3.module+el8.9.0+19644+d68f775d.x86_64.rpm
Red Hat Enterprise Linux8.9aarch64python-cffi-debugsource1.14.3-2.module+el8.9.0+19644+d68f775dpython-cffi-debugsource-1.14.3-2.module+el8.9.0+19644+d68f775d.aarch64.rpm
Red Hat Enterprise Linux8.9ppc64lepython-cffi-debugsource1.14.3-2.module+el8.9.0+19644+d68f775dpython-cffi-debugsource-1.14.3-2.module+el8.9.0+19644+d68f775d.ppc64le.rpm
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18 Jul 2026 21:04Current
7.4High risk
Vulners AI Score7.4
CVSS 3.19.4
EPSS0.01227
SSVC
CWE-22
tarfile modulearbitrary writesextraction directoryuntrusted archivesdata filter
4