{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53951", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-11T15:50:01.281Z", "datePublished": "2026-07-08T15:26:08.626Z", "dateUpdated": "2026-07-08T15:26:08.626Z"}, "containers": {"cna": {"title": "Copier: trust-prefix bypass via path traversal runs tasks unprompted", "problemTypes": [{"descriptions": [{"cweId": "CWE-22", "lang": "en", "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-94", "lang": "en", "description": "CWE-94: Improper Control of Generation of Code ('Code Injection')", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H", "version": "4.0"}}], "references": [{"name": "https://github.com/copier-org/copier/security/advisories/GHSA-9gmc-jqmh-3rvm", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/copier-org/copier/security/advisories/GHSA-9gmc-jqmh-3rvm"}, {"name": "https://github.com/copier-org/copier/releases/tag/v9.15.2", "tags": ["x_refsource_MISC"], "url": "https://github.com/copier-org/copier/releases/tag/v9.15.2"}], "affected": [{"vendor": "copier-org", "product": "copier", "versions": [{"version": ">= 9.5.0, < 9.15.2", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-08T15:26:08.626Z"}, "descriptions": [{"lang": "en", "value": "Copier is a library and CLI app for rendering project templates. In versions 9.5.0 through 9.15.1, the `trust` setting's prefix match\n(`copier/_settings.py`) compares the template URL against a trusted prefix with a raw `str.startswith` and no path normalization, while the URL is normalized when the template is actually fetched (`Path.resolve()` for local paths; libcurl dot-segment removal for `https`). A template reference that textually starts with a trusted prefix but contains `..` is therefore granted trust yet resolves to a different, attacker-controlled template, whose `tasks` / `migrations` / `jinja_extensions` then run without the `--trust` prompt \u2014 arbitrary command execution. Version 9.15.2 patches the issue."}], "source": {"advisory": "GHSA-9gmc-jqmh-3rvm", "discovery": "UNKNOWN"}}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[9.5.0,9.15.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "copier", "source": "cna", "vendor": "copier-org"}, "product": "copier", "vendor": "copier-org"}], "created": "2026-07-08T16:45:03.646546+00:00", "updated": "2026-07-08T16:45:03.646574+00:00", "vendors": ["copier-org", "copier-org$PRODUCT$copier"]}