CVE-2026-41140: Poetry has Path Traversal in tar extraction on Python 3.10.0 - 3.10.12 and 3.11.0 - 3.11.4

April 22, 2026 (updated April 27, 2026)

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.

References

github.com/advisories/GHSA-73h3-mf4w-8647
github.com/python-poetry/poetry
github.com/python-poetry/poetry/releases/tag/2.3.4
github.com/python-poetry/poetry/security/advisories/GHSA-73h3-mf4w-8647
nvd.nist.gov/vuln/detail/CVE-2026-41140

Code Behaviors & Features

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