CVE-2026-34730

MEDIUM SEVERITY

CVSS Score & Metrics

Base Score

5.5 / 10

Vector String

                                        CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N                                    

Vulnerability Description

Copier is a library and CLI app for rendering project templates. Prior to version 9.14.1, Copier's _external_data feature allows a template to load YAML files using template-controlled paths. If untrusted templates are in scope, a malicious template can read attacker-chosen YAML-parseable local files that are accessible to the user running Copier and expose their contents in rendered output. This issue has been patched in version 9.14.1.

Vulnerability Details

Published Date

April 01, 2026

Last Modified

April 03, 2026

CWE ID

CWE-22

Source

GitHub

Vendor

pip

Product

copier

External References

https://github.com/copier-org/copier/security/advisories/GHSA-hgjq-p8cr-gg4h
https://github.com/advisories/GHSA-hgjq-p8cr-gg4h

CVE-2026-34730

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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