# CVE-2026-34591: Poetry Has Wheel Path Traversal Which Can Lead to Arbitrary File Write

CVE-2026-34591 is fixed in poetry on 1 platform, first by DEBIAN-CVE-2026-34591, released April 2, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-34591
- Priority: Routine
- CVSS: 6.5 (Important)
- EPSS: 0.0049
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 2, 2026
- Weakness: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34591

## Description

Poetry is a dependency manager for Python. From version 1.4.0 to before version 2.3.3, a crafted wheel can contain ../ paths that Poetry writes to disk without containment checks, allowing arbitrary file write with the privileges of the Poetry process. It is reachable from untrusted package artifacts during normal install flows. (Normally, installing a malicious wheel is not sufficient for execution of malicious code. Malicious code will only be executed after installation if the malicious package is imported or invoked by the user.). This issue has been patched in version 2.3.3.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | poetry Debian 13.5 (trixie) | 2.1.2+dfsg-1+deb13u1 | [DEBIAN-CVE-2026-34591](https://patchblox.com/security/data/fix/linux/debian-cve-2026-34591.md) | Apr 2, 2026 |
| Linux | poetry Debian 14 | 2.3.4-0.1 | [DEBIAN-CVE-2026-34591](https://patchblox.com/security/data/fix/linux/debian-cve-2026-34591.md) | Apr 2, 2026 |

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Data as of 2026-11-08T06:59:42Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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