CVE-2026-44029 — Path Traversal

title: Nix Path Traversal via nix-prefetch-url --unpack - CVE-2026-44029
id: scw-2026-05-05-ai-1
status: experimental
level: high
description: |
  Detects the use of 'nix-prefetch-url --unpack' or 'nix store prefetch-file --unpack' with directory traversal characters ('../') in the command line. This specific pattern is indicative of the path traversal vulnerability (CVE-2026-44029) in Nix versions prior to 2.34.7, allowing arbitrary file writes.
author: SCW Feed Engine (AI-generated)
date: 2026-05-05
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-44029/
tags:
  - attack.credential_access
  - attack.t1552.001
logsource:
    category: process_creation
detection:
  selection:
      Image|endswith:
          - 'nix.exe'
      CommandLine|contains:
          - '--unpack'
      CommandLine|contains:
          - '../'
  condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse