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CVE-2025-64343

(conda) Constructor: Excessive permissions during and after installation

HIGH
7.8
CVSS Score
Published: November 7, 2025 at 05:20 AM UTC
Updated: June 17, 2026 at 09:54 AM UTC
1 product affected across 1 vendorConstructor

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Severity
HIGH7.8
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Constructor· Conda
60%
v < 3.13.0
Affected range stops below 3.13.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

x_refsource_CONFIRM
Source: cverecord
https://github.com/conda/constructor/security/advisories/GHSA-vvpr-2qg4-2mrq
x_refsource_MISC
Source: cverecord
https://github.com/conda/constructor/commit/c368383710a7c2b81ad1b0ecb9724b38d3577447
x_refsource_MISC
Source: cverecord
https://github.com/conda/constructor/releases/tag/3.13.0

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHGitHub_M
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-289

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