Arbitrary File Write in Poetry Dependency Manager for Python
CVE-2026-34591

7.1HIGH

Key Information:

Vendor

Python-poetry

Status
Poetry
Vendor
CVE Published:
2 April 2026

What is CVE-2026-34591?

The Poetry dependency manager for Python, version 1.4.0 up to but not including 2.3.3, allows maliciously crafted wheel files to write arbitrary files on the system. This occurs due to inadequate containment checks when the unsafe paths are encountered during installation. Although the installation of a rogue wheel does not inherently execute harmful code, it could lead to potential security issues if the user later imports or executes the malicious package. This vulnerability has been remediated in version 2.3.3.

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Affected Version(s)

poetry >= 1.4.0, < 2.3.3

References

https://github.com/python-poetry/poetry/security/advisori...
x_refsource_CONFIRM
https://github.com/python-poetry/poetry/pull/10792
x_refsource_MISC
https://github.com/python-poetry/poetry/releases/tag/2.3.3
x_refsource_MISC

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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