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

What is CVE-2026-34591?

CVE-2026-34591 is a high-severity path traversal vulnerability in python-poetry poetry, published on 2 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-22

Which versions are affected by CVE-2026-34591?

3 open source packages ship an affected version, including poetry. It affects 1 product.

Products include Python-Poetry Poetry.

How do I fix CVE-2026-34591?

Upgrade poetry to 2.3.3 or later.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2026-34591 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34591 exists.

Other vulnerabilities in python-poetry poetry

• CVE-2022-26184 Poetry before v1.1.9 contains Untrusted Search Path Critical 9.8
• CVE-2022-36069 Poetry Argument Injection vulnerability can lead to local Code Execution High 7.3
• CVE-2022-36070 Poetry's Untrusted Search Path can lead to Local Code Execution on Windows High 7.3

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-81899, DEBIAN-CVE-2026-34591, GHSA-2599-h6xx-hpxp, MINI-5vc4-rxj2-hq3j, PYSEC-2026-2260, ROOT-APP-PYPI-CVE-2026-34591 and 1 more.