{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-34730","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-03-30T18:41:20.754Z","datePublished":"2026-04-02T18:09:16.007Z","dateUpdated":"2026-04-03T13:01:14.081Z"},"containers":{"cna":{"title":"Copier `_external_data` allows path traversal and absolute-path local file read without unsafe mode","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":5.5,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/copier-org/copier/security/advisories/GHSA-hgjq-p8cr-gg4h","tags":["x_refsource_CONFIRM"],"url":"https://github.com/copier-org/copier/security/advisories/GHSA-hgjq-p8cr-gg4h"},{"name":"https://github.com/copier-org/copier/commit/5413062eb17b73dc885f5e645cdc161e69ef641b","tags":["x_refsource_MISC"],"url":"https://github.com/copier-org/copier/commit/5413062eb17b73dc885f5e645cdc161e69ef641b"},{"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":"2026-04-02T18:09:16.007Z"},"descriptions":[{"lang":"en","value":"Copier is a library and CLI app for rendering project templates. Prior to version 9.14.1, Copier's _external_data feature allows a template to load YAML files using template-controlled paths. If untrusted templates are in scope, a malicious template can read attacker-chosen YAML-parseable local files that are accessible to the user running Copier and expose their contents in rendered output. This issue has been patched in version 9.14.1."}],"source":{"advisory":"GHSA-hgjq-p8cr-gg4h","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/copier-org/copier/security/advisories/GHSA-hgjq-p8cr-gg4h","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-03T13:01:09.904637Z","id":"CVE-2026-34730","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":"2026-04-03T13:01:14.081Z"}}]}}