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.
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Fixes
Solution
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Workaround
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References
History
Fri, 31 Jul 2026 20:45:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
Copier-org
Copier-org copier |
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| Vendors & Products |
Copier-org
Copier-org copier |
Fri, 31 Jul 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Fri, 31 Jul 2026 19:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Copier: Percent-encoded dot segments in template URLs can allow trusted-prefix escape (Incomplete fix for trust-prefix bypass) | |
| Weaknesses | CWE-180 CWE-22 |
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| References |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-07-31T19:59:30.346Z
Reserved: 2026-07-14T23:10:57.032Z
Link: CVE-2026-62999
Updated: 2026-07-31T19:59:25.678Z
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OpenCVE Enrichment
Updated: 2026-07-31T20:30:17Z