{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-34726","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-03-30T18:41:20.753Z","datePublished":"2026-04-02T18:07:35.517Z","dateUpdated":"2026-04-03T16:16:03.275Z"},"containers":{"cna":{"title":"Copier `_subdirectory` allows template root escape via parent-directory traversal","problemTypes":[{"descriptions":[{"cweId":"CWE-22","lang":"en","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":4.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/copier-org/copier/security/advisories/GHSA-85v3-4m8g-hrh6","tags":["x_refsource_CONFIRM"],"url":"https://github.com/copier-org/copier/security/advisories/GHSA-85v3-4m8g-hrh6"},{"name":"https://github.com/copier-org/copier/commit/cb80a3ffc9c3787de3ed837e04ca29a0ff8ca3df","tags":["x_refsource_MISC"],"url":"https://github.com/copier-org/copier/commit/cb80a3ffc9c3787de3ed837e04ca29a0ff8ca3df"},{"name":"https://github.com/copier-org/copier/releases/tag/v9.14.1","tags":["x_refsource_MISC"],"url":"https://github.com/copier-org/copier/releases/tag/v9.14.1"}],"affected":[{"vendor":"copier-org","product":"copier","versions":[{"version":"< 9.14.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-04-02T18:07:35.517Z"},"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."}],"source":{"advisory":"GHSA-85v3-4m8g-hrh6","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/copier-org/copier/security/advisories/GHSA-85v3-4m8g-hrh6","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-03T16:15:43.192383Z","id":"CVE-2026-34726","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-03T16:16:03.275Z"}}]}}