{"id":"CVE-2025-55201","aliases":["GHSA-3xw7-v6cj-5q8h","PYSEC-2026-1271"],"url":"https://o3.security/vulnerability/CVE-2025-55201","summary":"Copier safe template has arbitrary filesystem read/write access","details":"Copier library and CLI app for rendering project templates. Prior to 9.9.1, a safe template can currently read and write arbitrary files because Copier exposes a few pathlib.Path objects in the Jinja context which have unconstrained I/O methods. This effectively renders the security model w.r.t. filesystem access useless. This vulnerability is fixed in 9.9.1.","published":"2025-08-18T16:21:25.576Z","modified":"2026-08-08T03:47:56.307685184Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"copier","fixedVersion":"9.9.1"}],"fix":{"url":"https://github.com/copier-org/copier/commit/3feea3b3ff3c20d80cbb16a2f3b9567ffc5606d1","label":"copier-org/copier@3feea3b"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/55xxx/CVE-2025-55201.json"},{"type":"ADVISORY","url":"https://github.com/copier-org/copier/security/advisories/GHSA-3xw7-v6cj-5q8h"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-55201"},{"type":"FIX","url":"https://github.com/copier-org/copier/commit/3feea3b3ff3c20d80cbb16a2f3b9567ffc5606d1"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-08T03:47:56.307685184Z"}}