CVE-2026-41140

Poetry: Path traversal in tar extraction on Python 3.10.0 - 3.10.12 and 3.11.0 - 3.11.4

CVE-2026-41140 is fixed in poetry on 1 platform, first by DEBIAN-CVE-2026-41140, released May 15, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

n/a

Low

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0029

22nd percentile

Poetry is a dependency manager for Python. Prior to 2.3.4, the extractall() function in src/poetry/utils/helpers.py:410-426 extracts sdist tarballs without path traversal protection on Python versions where tarfile.data_filter is unavailable. Considering only Python versions which are still supported by Poetry, these are 3.10.0 - 3.10.12 and 3.11.0 - 3.11.4. This vulnerability is fixed in 2.3.4.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
poetry · Debian 13.5 (trixie)	2.1.2+dfsg-1	DEBIAN-CVE-2026-41140	May 15, 2026
poetry · Debian 14	2.1.2+dfsg-1	DEBIAN-CVE-2026-41140	May 15, 2026

Details

Published
April 24, 2026
Weakness
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41140

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