Vulnerability · Published Nov 7, 2025 · Assigned by GitHub_M
CVE-2025-64343(conda) Constructor: Excessive permissions during and after installation
High 7.8
In plain English
A high-severity security flaw in constructor from conda. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Official description
(conda) Constructor is a tool that enables users to create installers for conda package collections. In versions 3.12.2 and below, the installation directory inherits permissions from its parent directory. Outside of restricted directories, the permissions are very permissive and often allow write access by authenticated users. Any logged in user can make modifications during the installation for both single-user and all-user installations. This constitutes a local attack vector if the installation is in a directory local users have access to. For single-user installations in a shared directory, these permissions persist after the installation. This issue is fixed in version 3.13.0.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| conda | constructor | < 3.13.0 |
Weakness: CWE-289 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/conda/constructor/security/advisories/GHSA-vvpr-2qg4-2mrq x_refsource_CONFIRM
- https://github.com/conda/constructor/commit/c368383710a7c2b81ad1b0ecb9724b38d3577447 x_refsource_MISC
- https://github.com/conda/constructor/releases/tag/3.13.0 x_refsource_MISC