Improper Connection Handling in Nix on macOS and FreeBSD
CVE-2026-110453

4.3MEDIUM

Key Information:

Vendor

Nixos

Status
Nix
Vendor
CVE Published:
14 October 2026

What is CVE-2026-110453?

Nix versions before 2.35.3 exhibit a vulnerability that can lead to improper connection handling, particularly when run unsandboxed on macOS or FreeBSD. This flaw allows connections initiated by build users from daemon clients, potentially exposing sensitive operations to unauthorized access. Users are advised to upgrade to the latest version to mitigate these risks.

Affected Version(s)

Nix 0 < 2.28.8

Nix 2.29.0 < 2.30.6

Nix 2.31.0 < 2.31.6

References

https://discourse.nixos.org/t/security-advisory-for-nix-a...

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.