CVE-2026-34726

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Source

https://cve.org/CVERecord?id=CVE-2026-34726

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34726.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-34726

Aliases

GHSA-85v3-4m8g-hrh6

Published

2026-04-02T18:07:35.517Z

Modified

2026-07-08T08:12:53.622407714Z

Severity

4.4 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N CVSS Calculator

Summary

Copier `_subdirectory` allows template root escape via parent-directory traversal

Details

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-directory traversal such as .. and uses it directly when selecting the template root. As a result, a template can escape its own directory and make Copier render files from the parent directory without --UNSAFE. This issue has been patched in version 9.14.1.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34726.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-22"
    ]
}

References

Affected packages

Git / github.com/copier-org/copier

Affected ranges

Type

GIT

Repo

https://github.com/copier-org/copier

Events

Introduced

Fixed

f6ac94689a0a672ae1a53d442740fb85dbd4004f

Fixed

cb80a3ffc9c3787de3ed837e04ca29a0ff8ca3df

Database specific

{
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "cpe": "cpe:2.3:a:copier-org:copier:*:*:*:*:*:python:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "9.14.1"
        }
    ]
}

Affected versions

1.*

1.1.1

3.*

3.0.0-alpha5

3.0.0-alpha6

v2.*

v2.2.3

v2.3

v2.3.1

v2.3.2

v2.3.3

v2.4.0

v2.4.1

v2.4.2

v2.5.0

v2.5.1

v3.*

v3.0.0

v3.0.0-alpha1

v3.0.0-alpha2

v3.0.0-alpha3

v3.0.0-alpha4

v3.0.0-alpha7

v3.0.0-alpha8

v3.0.0-beta1

v3.0.1

v3.0.2

v3.0.3

v3.0.4

v3.0.5

v3.0.6

v3.1.0

v3.2.0

v4.*

v4.0.0

v4.0.1

v4.0.2

v4.1.0

v5.*

v5.0.0

v5.1.0

v6.*

v6.0.0

v6.0.0a0

v6.0.0a1

v6.0.0a2

v6.0.0a3

v6.0.0a4

v6.0.0a5

v6.0.0a6

v6.0.0a7

v6.0.0a8

v6.0.0a9

v6.0.0b0

v6.1.0

v6.2.0

v7.*

v7.0.1

v7.1.0

v7.1.0a0

v7.2.0

v8.*

v8.0.0

v8.1.0

v8.2.0

v8.3.0

v9.*

v9.0.0

v9.0.1

v9.1.1

v9.10.0

v9.10.1

v9.10.2

v9.10.3

v9.11.0

v9.11.1

v9.11.2

v9.11.3

v9.12.0

v9.13.0

v9.13.1

v9.14.0

v9.2.0

v9.3.0

v9.3.1

v9.4.0

v9.4.1

v9.5.0

v9.6.0

v9.7.0

v9.7.1

v9.8.0

v9.9.0

v9.9.1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34726.json"