algokit (>=0.2.0 <=2.10.0), algorun (>=0.0.1b1 <=0.0.1b4) +38 more potentially affected by CVE-2026-34726 via copier (>=2.3.3 <=9.11.3)

copier PYPI version =2.3.3, =0.2.0, =0.0.1b1, =0.0.1, =0.11.0, =0.31.0, =1.4.14, =0.2.3, =2.0.0, =0.18.0, =0.9.0, =0.10.0, =0.1.1, =0.14.1, =0.1.0, =0.1.10, =0.1.11 and more Source cves: CVE-2026-34726 Source advisory: OSV:GHSA-85V3-4M8G-HRH6...

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...

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...

algokit (>=2.9.0 <=2.10.0), biopipen (>=1.0.0 <=1.3.8) +4 more potentially affected by CVE-2026-23986 via copier (>=9.0.1 <=9.11.1)

copier PYPI version =9.0.1, =2.9.0, =1.0.0, =2.2.2, =1.2.1, =2.14.1, =2.51.0 Source cves: CVE-2026-23986 Source advisory: SNYK:PYTHON-COPIER-15054509...

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 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

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...

Copier safe template has arbitrary filesystem write access via directory symlinks when _preserve_symlinks: true

Impact 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 turns out, a safe template can currently write to arbitrary directories outside the...

algokit (>=0.2.0 <=2.10.0), algorun (>=0.0.1b1 <=0.0.1b4) +37 more potentially affected by CVE-2026-23986 via copier (>=2.3.3 <=9.11.1)

copier PYPI version =2.3.3, =0.2.0, =0.0.1b1, =0.0.1, =0.11.0, =0.31.0, =1.4.14, =0.2.3, =2.0.0, =0.18.0, =0.9.0, =0.10.0, =0.1.1, =0.14.1, =0.1.0, =0.1.10, =0.1.11 and more Source cves: CVE-2026-23986 Source advisory: OSV:GHSA-4FQP-R85R-HXQH...

EUVD-2026-4141

Copier safe template has arbitrary filesystem write access via directory symlinks when preservesymlinks: true...

GHSA-4FQP-R85R-HXQH Copier safe template has arbitrary filesystem write access via directory symlinks when _preserve_symlinks: true

Impact 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 turns out, a safe template can currently write to arbitrary directories outside the...

CVE-2026-23968 Copier safe template has arbitrary filesystem read access via symlinks when _preserve_symlinks: false

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...