CVE-2026-62999

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Source
https://cve.org/CVERecord?id=CVE-2026-62999
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-62999.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-62999
Aliases
  • GHSA-34mv-rjq9-5mch
Published
2026-07-31T19:41:55.494Z
Modified
2026-08-02T03:47:28.574880839Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
Summary
Copier: Percent-encoded dot segments in template URLs can allow trusted-prefix escape (Incomplete fix for trust-prefix bypass)
Details

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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62999.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-180",
        "CWE-22"
    ]
}
References

Affected packages

Git / github.com/copier-org/copier

Affected ranges

Type
GIT
Repo
https://github.com/copier-org/copier
Events
Introduced
d735c8beac8307c06d9c881714328b76711a4b4d
Fixed
fa9ce15ad39e1eb3085eeed4adb7b16a25e643e6
Fixed
7408f0d6287a7bf452715fd9f25dc54eaba3c295
Fixed
02e1574b125bd6201b55c01aab23146489c89663
Database specific 
{
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "9.5.0"
        },
        {
            "fixed": "9.16.0"
        }
    ]
}

Affected versions

v9.*
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
v9.14.1
v9.14.2
v9.14.3
v9.15.0
v9.15.1
v9.15.2
v9.16.0
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-2026-62999.json"