CVE-2026-34726

{"id": "CVE-2026-34726", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34726", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-03T16:15:43.192383Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.4, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 2.5, "exploitabilityScore": 1.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "copier-org", "product": "copier", "versions": [{"status": "affected", "version": "< 9.14.1"}]}]}], "published": "2026-04-02T19:21:32.320", "references": [{"url": "https://github.com/copier-org/copier/commit/cb80a3ffc9c3787de3ed837e04ca29a0ff8ca3df", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/copier-org/copier/releases/tag/v9.14.1", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/copier-org/copier/security/advisories/GHSA-85v3-4m8g-hrh6", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/copier-org/copier/security/advisories/GHSA-85v3-4m8g-hrh6", "tags": ["Exploit", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-22"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Copier es una biblioteca y aplicaci\u00f3n CLI para renderizar plantillas de proyecto. Antes de la versi\u00f3n 9.14.1, la configuraci\u00f3n _subdirectory de Copier est\u00e1 documentada como el subdirectorio a usar como ra\u00edz de la plantilla. Sin embargo, la implementaci\u00f3n actual acepta salto de directorio padre como .. y lo usa directamente al seleccionar la ra\u00edz de la plantilla. Como resultado, una plantilla puede escapar de su propio directorio y hacer que Copier renderice archivos del directorio padre sin --UNSAFE. Este problema ha sido parcheado en la versi\u00f3n 9.14.1."}], "lastModified": "2026-07-24T21:10:00.143", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:copier-org:copier:*:*:*:*:*:python:*:*", "vulnerable": true, "matchCriteriaId": "08914294-5C57-49CB-8D05-BBB156C6B8B1", "versionEndExcluding": "9.14.1"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}