# 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.

- Web page: https://patchblox.com/security/cve/CVE-2026-41140
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.0029
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 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

## Description

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

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | poetry Debian 13.5 (trixie) | 2.1.2+dfsg-1 | [DEBIAN-CVE-2026-41140](https://patchblox.com/security/data/fix/linux/debian-cve-2026-41140.md) | May 15, 2026 |
| Linux | poetry Debian 14 | 2.1.2+dfsg-1 | [DEBIAN-CVE-2026-41140](https://patchblox.com/security/data/fix/linux/debian-cve-2026-41140.md) | May 15, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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