Path Traversal in Copier-org Copier
CVE-2026-34726
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-dire…
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.004 (30.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.
Affected products
- Copier-org Copier — versions < 9.14.1
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-34726?
- CVE-2026-34726 is a medium-severity vulnerability in Copier-org Copier, classified under Path Traversal. CVSS score: 4.4/10. Published 2026-04-02.
- How severe is CVE-2026-34726?
- Medium severity. CVSS v3 base score is 4.4 out of 10.