Path Traversal in Copier-Org Copier
CVE-2026-62999
Copier is a library and CLI app for rendering project templates. From 9.5.0 through 9.16.0, percent-encoded parent-directory segments or encoded path separators in a template URL can match a configured trusted repository prefix before an HTTP server or Git transport decodes the path, allowing unsafe template features from a repository outside the trusted prefix to run after user interaction. This issue is fixed in version 9.17.0.
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.004 (30.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Copier-org Copier — versions >= 9.5.0, <= 9.16.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-62999?
- CVE-2026-62999 is a high-severity vulnerability in Copier-Org Copier, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-07-31.
- How severe is CVE-2026-62999?
- High severity. CVSS v3 base score is 7.5 out of 10.