CVE-2026-34591
What it 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.
At a glance
- Exploitability
- Can be exploited over the network without logging in, but needs a user to act. High risk of data tampering.
- Exploit odds
- 0.5% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.5% in the next 30 days (EPSS).
- Severity: 7.1 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.5% · EPSS, next 30 days
- Weakness
- CWE-22 · Path traversal
- Record status
- Analyzed
Affected
- python-poetry Poetry < 2.3.3
Attack profile CVSS 4.0 · 7.1
- Attack vector
- Network
- Complexity
- Low
- Attack requirements
- None
- Privileges needed
- None
- User interaction
- Passive
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Raw 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-34591.md and follow it. Check whether this project is affected by CVE-2026-34591. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- http://github.com/python-poetry/poetry/commit/ed59537ac3709cfbdbf95d957de801c13872991a
- https://github.com/python-poetry/poetry/pull/10792
- https://github.com/python-poetry/poetry/releases/tag/2.3.3
- https://github.com/python-poetry/poetry/security/advisories/GHSA-2599-h6xx-hpxp
- https://github.com/python-poetry/poetry/security/advisories/GHSA-2599-h6xx-hpxp
References
- http://github.com/python-poetry/poetry/commit/ed59537ac3709cfbdbf95d957de801c13872991a
- https://github.com/python-poetry/poetry/pull/10792
- https://github.com/python-poetry/poetry/releases/tag/2.3.3
- https://github.com/python-poetry/poetry/security/advisories/GHSA-2599-h6xx-hpxp
- https://github.com/python-poetry/poetry/security/advisories/GHSA-2599-h6xx-hpxp