Copier 路径遍历漏洞

Copier is an open-source library developed by Copier for rendering project templates. Versions of Copier prior to 9.14.1 contained a path traversal vulnerability. This vulnerability stemmed from the ability for the subdirectory setting to allow traversal of the parent directory, potentially...

Copier 路径遍历漏洞

Copier is an open-source library developed by Copier for rendering project templates. Versions of Copier prior to 9.14.1 contained a path traversal vulnerability. This vulnerability stemmed from the externaldata function, which allowed templates to load YAML files using path-based operations...

CVE-2026-34726: Improper Limitation of a Pathname to a Restricted Directory

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...

CVE-2026-34730: Improper Limitation of a Pathname to a Restricted Directory

Copier is a library and CLI app for rendering project templates. Prior to version 9.14.1, Copier's externaldata feature allows a template to load YAML files using template-controlled paths. If untrusted templates are in scope, a malicious template can read attacker-chosen YAML-parseable local fil...

GHSA-HGJQ-P8CR-GG4H Copier `_external_data` allows path traversal and absolute-path local file read without unsafe mode

Summary Copier's externaldata feature allows a template to load YAML files using template-controlled paths. The documentation describes these values as relative paths from the subproject destination, so relative paths themselves appear to be part of the intended feature model. However, the curren...

Directory Traversal

Overview copier is an A library for rendering project templates. Affected versions of this package are vulnerable to Directory Traversal via the externaldata paths. If a user runs Copier on an untrusted template, an attacker can access and expose the contents of arbitrary local files by supplying...

Directory Traversal

Overview copier is an A library for rendering project templates. Affected versions of this package are vulnerable to Directory Traversal via the subdirectory setting, which allows parent-directory traversal. If a user runs Copier on an untrusted template, an attacker can access files outside the...

GHSA-85V3-4M8G-HRH6 Copier `_subdirectory` allows template root escape via parent-directory traversal

Summary 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 ma...

Copier `_subdirectory` allows template root escape via parent-directory traversal

Summary 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 ma...

PT-2026-29668

Name of the Vulnerable Software and Affected Versions Copier versions prior to 9.14.1 Description Copier's subdirectory setting, intended to specify the template root, incorrectly allows parent directory traversal sequences like ... This allows a template to escape its directory and render files...

CVE-2026-34726

creationtimestamp| type| source ---|---|--- 2026-03-31 12:07:58+00:00| published-proof-of-concept| https://github.com/copier-org/copier/security/advisories/GHSA-85v3-4m8g-hrh6...

CVE-2026-23968

Copier is a library and CLI app for rendering project templates. Prior to version 9.11.2, Copier suggests that it's safe to generate a project from a safe template, i.e. one that doesn't use unsafe features like custom Jinja extensions which would require passing the --UNSAFE,--trust flag. As it...

CVE-2026-23986

Copier is a library and CLI app for rendering project templates. Prior to version 9.11.2, Copier suggests that it's safe to generate a project from a safe template, i.e. one that doesn't use unsafe features like custom Jinja extensions which would require passing the --UNSAFE,--trust flag. As it...

CVE-2026-23968

Copier is a library and CLI app for rendering project templates. Prior to version 9.11.2, Copier suggests that it's safe to generate a project from a safe template, i.e. one that doesn't use unsafe features like custom Jinja extensions which would require passing the --UNSAFE,--trust flag. As it...

CVE-2026-23986

Copier is a library and CLI app for rendering project templates. Prior to version 9.11.2, Copier suggests that it's safe to generate a project from a safe template, i.e. one that doesn't use unsafe features like custom Jinja extensions which would require passing the --UNSAFE,--trust flag. As it...

UNIX Symbolic Link (Symlink) Following

Overview copier is an A library for rendering project templates. Affected versions of this package are vulnerable to UNIX Symbolic Link Symlink Following via the symlink resolution process in safe templates when preservesymlinks is set to true. An attacker can overwrite arbitrary files on the...

CVE-2026-23986

CVE-2026-23986 affects Copier (library and CLI). A safe template can still write outside the destination when using a symlink and _preserve_symlinks: true, enabling a malicious template to overwrite arbitrary files within the user’s write permissions. This risk exists prior to version 9.11.2 and ...

CVE-2026-23986 Copier safe template has arbitrary filesystem write access via directory symlinks when _preserve_symlinks: true

Copier is a library and CLI app for rendering project templates. Prior to version 9.11.2, Copier suggests that it's safe to generate a project from a safe template, i.e. one that doesn't use unsafe features like custom Jinja extensions which would require passing the --UNSAFE,--trust flag. As it...

CVE-2026-23986 Copier safe template has arbitrary filesystem write access via directory symlinks when _preserve_symlinks: true

Copier is a library and CLI app for rendering project templates. Prior to version 9.11.2, Copier suggests that it's safe to generate a project from a safe template, i.e. one that doesn't use unsafe features like custom Jinja extensions which would require passing the --UNSAFE,--trust flag. As it...

CVE-2026-23986 Copier safe template has arbitrary filesystem write access via directory symlinks when _preserve_symlinks: true

Copier is a library and CLI app for rendering project templates. Prior to version 9.11.2, Copier suggests that it's safe to generate a project from a safe template, i.e. one that doesn't use unsafe features like custom Jinja extensions which would require passing the --UNSAFE,--trust flag. As it...