CVE-2026-23968

Severity CVSS v4.0:

MEDIUM

Type:

Unavailable / Other

Publication date:

21/01/2026

Last modified:

21/01/2026

Description

Copier is a library and CLI app for rendering project templates. Prior to version 9.11.2, Copier suggests that it&#39;s safe to generate a project from a safe template, i.e. one that doesn&#39;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 include arbitrary files/directories outside the local template clone location by using symlinks along with `_preserve_symlinks: false` (which is Copier&#39;s default setting). Version 9.11.2 patches the issue.

Impact

Vector 4.0

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVSS v4.0 Severity and Metrics:

Base Score: 6.80 MEDIUM
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Attack Vector (AV): Local
Attack Complexity (AC): Low
Attack Requirements (AT): None
Privileges Required (PR): None
User Interaction (UI): Passsive
Confidentiality (VC): High
Integrity (VI): None
Availability (VA): None
Confidentiality (SC): None
Integrity (SI): None
Availability (SA): None

Base Score 4.0

6.80

Severity 4.0

MEDIUM

CVE-2026-23968

Description

Impact

References to Advisories, Solutions, and Tools