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Untriaged
Permalink CVE-2026-34726
4.4 MEDIUM
  • CVSS version: 3.1
  • Attack vector (AV): LOCAL
  • Attack complexity (AC): LOW
  • Privileges required (PR): NONE
  • User interaction (UI): REQUIRED
  • Scope (S): UNCHANGED
  • Confidentiality impact (C): LOW
  • Integrity impact (I): LOW
  • Availability impact (A): NONE
created 2 weeks, 1 day ago
Copier `_subdirectory` allows template root escape via parent-directory traversal

Copier is a library and CLI app for rendering project templates. Prior to version 9.14.1, Copier's _subdirectory setting is documented as the subdirectory to use as the template root. However, the current implementation accepts parent-directory traversal such as .. and uses it directly when selecting the template root. As a result, a template can escape its own directory and make Copier render files from the parent directory without --UNSAFE. This issue has been patched in version 9.14.1.

Affected products

copier
  • ==< 9.14.1

Matching in nixpkgs

pkgs.copier

Library and command-line utility for rendering projects templates

pkgs.apksigcopier

Copy/extract/patch android apk signatures & compare APKs

pkgs.gnomeExtensions.copier

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  • nixos-unstable 8
    • nixpkgs-unstable 8
    • nixos-unstable-small 8
  • nixos-25.11 8
    • nixos-25.11-small 8
    • nixpkgs-25.11-darwin 8

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