Path Traversal

Copier is vulnerable to Path Traversal. The vulnerability is due to exposing unconstrained pathlib.Path objects in the Jinja context, which allows an attacker to read and write arbitrary files on the filesystem...

CVE-2025-55201

Copier library and CLI app for rendering project templates. Prior to 9.9.1, a safe template can currently read and write arbitrary files because Copier exposes a few pathlib.Path objects in the Jinja context which have unconstrained I/O methods. This effectively renders the security model w.r.t...

Copier's safe template has arbitrary filesystem read/write access

Impact Copier's current security model shall restrict filesystem access through Jinja: - Files can only be read using % include ... %, which is limited by Jinja to reading files from the subtree of the local template clone in our case. - Files are written in the destination directory according to...

GHSA-3XW7-V6CJ-5Q8H Copier's safe template has arbitrary filesystem read/write access

Impact Copier's current security model shall restrict filesystem access through Jinja: - Files can only be read using % include ... %, which is limited by Jinja to reading files from the subtree of the local template clone in our case. - Files are written in the destination directory according to...

Arbitrary File Read/Write

Overview copier is an A library for rendering project templates. Affected versions of this package are vulnerable to Arbitrary File Read/Write via the exposure of pathlib.Path objects in the Jinja context, which have unconstrained I/O methods. An attacker can access or modify arbitrary files on t...

CVE-2025-55201

CVE-2025-55201 concerns the Copier library/CLI used for rendering project templates. Prior to version 9.9.1, the template rendering context exposes certain pathlib.Path objects in Jinja with unconstrained I/O methods, enabling a safe template to read and write arbitrary files on the filesystem an...

CVE-2025-55201 Copier safe template has arbitrary filesystem read/write access

Copier library and CLI app for rendering project templates. Prior to 9.9.1, a safe template can currently read and write arbitrary files because Copier exposes a few pathlib.Path objects in the Jinja context which have unconstrained I/O methods. This effectively renders the security model w.r.t...

CVE-2025-55201 Copier safe template has arbitrary filesystem read/write access

Copier library and CLI app for rendering project templates. Prior to 9.9.1, a safe template can currently read and write arbitrary files because Copier exposes a few pathlib.Path objects in the Jinja context which have unconstrained I/O methods. This effectively renders the security model w.r.t...

PT-2025-33667 · Copier · Copier

Name of the Vulnerable Software and Affected Versions: Copier versions prior to 9.9.1 Description: Copier exposes pathlib.Path objects in the Jinja context with unconstrained I/O methods, allowing a safe template to read and write arbitrary files. This renders the security model regarding...