Medium 5.5Published Apr 2, 2026

CVE-2026-34730Copier is a library and CLI app for rendering project templates.

Updated under an hour ago (2026-10-19 07:00 UTC)

Does this affect you?

It affects copier-org copier. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for copier-org copier

Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-22
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jul 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

copier-org copier copier-org:copier	before 9.14.1	NVD

References

https://github.com/copier-org/copier/commit/5413062eb17b73dc885f5e645cdc161e69ef641bpatch
https://github.com/copier-org/copier/releases/tag/v9.14.1release-notes
https://github.com/copier-org/copier/security/advisories/GHSA-hgjq-p8cr-gg4hexploit, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.