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[3.13] gh-161323: Refuse drive-relative paths in tarfile extraction filters (GH-161334) - #161357
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…lters (pythonGH-161334) * pythongh-161323: Refuse drive-relative paths in tarfile extraction filters On Windows, os.path.join() does not put a name such as 'C:foo' below a destination that has no drive, so the 'tar' and 'data' filters now refuse names and link targets with a drive, after normalization. Fixes CVE-2026-107784. reported by Girish Konda ANT-2026-RSL1F4AT (cherry picked from commit e4c751b) Co-authored-by: Gregory P. Smith <68491+gpshead@users.noreply.github.com> Co-authored-by: Petr Viktorin <encukou@gmail.com>
This was referenced Nov 4, 2026
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On Windows, os.path.join() does not put a name such as 'C:foo' below a
destination that has no drive, so the 'tar' and 'data' filters now refuse
names and link targets with a drive, after normalization.
Fixes CVE-2026-107784.
reported by Girish Konda
ANT-2026-RSL1F4AT
(cherry picked from commit e4c751b)
Co-authored-by: Gregory P. Smith 68491+gpshead@users.noreply.github.com
Co-authored-by: Petr Viktorin encukou@gmail.com