{"id":"CVE-2026-62999","title":"Copier is a library and CLI app for rendering project templates","summary":"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…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-22","CWE-180"],"vendor":"copier-org","product":"copier","affected":["copier >= 9.5.0, <= 9.16.0"],"published":"2026-07-31","updated":"2026-09-09","sourceUpdated":"2026-09-09T20:55:04.493","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-62999","references":[{"url":"https://github.com/copier-org/copier/commit/7408f0d6287a7bf452715fd9f25dc54eaba3c295","label":"security-advisories@github.com"},{"url":"https://github.com/copier-org/copier/releases/tag/v9.17.0","label":"security-advisories@github.com"},{"url":"https://github.com/copier-org/copier/security/advisories/GHSA-34mv-rjq9-5mch","label":"security-advisories@github.com"},{"url":"https://github.com/copier-org/copier/security/advisories/GHSA-34mv-rjq9-5mch","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-07-31T19:59:06.929791Z"},"ingestedAt":"2026-09-14T12:22:18.666Z","epss":0.00367,"epssPercentile":0.30554,"slug":"CVE-2026-62999","body":"## Overview\n\nCopier 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}