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TI-2025-39776 Aliases CVE-2025-64343

(conda) Constructor: Excessive permissions during and after installation

Priority LOW 35CWE-289Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

(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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00128 2nd percentileScored 2026-11-07
Fix Fixed constructor (conda): 3.13.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
condaconstructorbefore 3.13.03.13.0Patch availableCNA
  • constructor Vendorconda Affected before 3.13.0 Fixed in 3.13.0 Patch available CNA

Remediation

  • Fix · CNA constructor (conda) Fixed in 3.13.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-64343

References

Other 3

  • TI-2026-38909 Conda: Entry-point path traversal in noarch:python install (arbitrary file write) — canonical Python implementation CVSS 3.1HIGH 8.8
  • TI-2025-23835 Conda-build Allows Arbitrary Code Execution via Malicious Recipe Selectors CVSS 4.0HIGH 8.2
  • TI-2025-23836 Conda-build Vulnerable to Path Traversal via Malicious Tar File CVSS 4.0MEDIUM 5.6
  • TI-2026-79928 Pwn request in Conda infrastructure workflow exposes SYNC_TOKEN CVSS 3.1CRITICAL 9.9
  • TI-2025-23837 Conda-build vulnerable to supply chain attack vector due to pyproject.toml referring to dependencies not present in PyPI CVSS 4.0HIGH 7.2
  • TI-2024-30877 Miniconda3 macOS installers before 23.11.0-1 contain a local privilege escalation… CVSS 3.1HIGH 7.8
See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences