Medium severity5.5OSV Advisory· Published Jan 21, 2026· Updated Jun 17, 2026
CVE-2026-23968
CVE-2026-23968
Description
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 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's default setting). Version 9.11.2 patches the issue.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
copierPyPI | < 9.11.2 | 9.11.2 |
Affected products
31.1.1, 3.0.0-alpha5, 3.0.0-alpha6, …+ 1 more
- (no CPE)range: 1.1.1, 3.0.0-alpha5, 3.0.0-alpha6, …
- cpe:2.3:a:copier-org:copier:*:*:*:*:*:python:*:*range: <9.11.2
Patches
Vulnerability mechanics
References
4- github.com/copier-org/copier/commit/b3a7b3772d17cf0e7a4481978188c9f536c8d8f6nvdPatchWEB
- github.com/copier-org/copier/security/advisories/GHSA-xjhm-gp88-8pfxnvdExploitThird Party AdvisoryWEB
- github.com/advisories/GHSA-xjhm-gp88-8pfxghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-23968ghsaADVISORY
News mentions
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