python-poetry up to 2.3.2 on Python path traversal

Summaryinfo

A vulnerability was found in python-poetry poetry up to 2.3.2 on Python. It has been rated as critical. The impacted element is an unknown function. The manipulation leads to path traversal. This vulnerability is uniquely identified as CVE-2026-34591. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in python-poetry poetry up to 2.3.2 on Python. It has been rated as critical. This issue affects an unknown function. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-34591 since 03/30/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 304878 (Linux Distros Unpatched Vulnerability : CVE-2026-34591), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.3.3 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch ed59537ac3709cfbdbf95d957de801c13872991a is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (304878). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Programming Language Software

Vendor

• python-poetry

Name

• poetry

Version

• 2.3.0
• 2.3.1
• 2.3.2

License

• open-source

Website

• Product: https://github.com/python-poetry/poetry/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion