---
id: CVE-2026-110453
title: >-
  Nix before 2.35.3, when unsandboxed on macOS or FreeBSD, incorrectly allows
  connections made by build users from daemon clients.
summary: >-
  Nix before 2.35.3, when unsandboxed on macOS or FreeBSD, incorrectly allows
  connections made by build users from daemon clients.
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N'
cwe:
  - CWE-863
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T05:16:43.377'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110453'
references:
  - url: >-
      https://discourse.nixos.org/t/security-advisory-for-nix-and-lix-october-2026/80547
    label: cve@mitre.org
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-110453.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-110453'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-110453'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
  - cve.org
ingestedAt: '2026-10-14T06:17:13.782Z'
vendor: Red Hat
product: Nix
affected:
  - Nix < 2.28.8
  - Nix >= 2.29.0 < 2.30.6
  - Nix >= 2.31.0 < 2.31.6
  - Nix >= 2.32.0 < 2.34.9
  - Nix >= 2.35.0 < 2.35.3
epss: 0.00132
epssPercentile: 0.02731
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-19T18:33:23.046919Z'
---

## Overview

Nix before 2.35.3, when unsandboxed on macOS or FreeBSD, incorrectly allows connections made by build users from daemon clients.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · updated 2026-10-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-110453.json)