{"id":"CVE-2026-93353","revision":null,"records":[{"revision":"a21b304f376f4c17aac2a218a9f094bc","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-93353","aliases":[],"title":"copyparty SFTP Volume Restriction Bypass via mkdir/rmdir/chattr Handlers","description":"copyparty contains a volume restriction bypass vulnerability in its SFTP front end that allows authenticated SFTP users to create, remove, and truncate arbitrary paths outside permitted volume boundaries by exploiting three handlers that bypass the xvol volflag enforcement. The _mkdir, _rmdir, and _chattr handlers construct destination paths using vfs.get(), vn.canonical(), and os.path.join() without invoking the chk_ap access check, enabling attackers to traverse symlinks leaving a volume's top directory and perform unauthorized file creation, deletion, or truncation via SSH_FXP_SETSTAT operations on paths outside any volume the account is authorized to access.","state":0,"publishedAt":"2026-09-24T20:29:36.253+00:00","modifiedAt":"2026-10-01T15:21:59.079+00:00","affected":[{"ecosystem":"https://pypi.org/project/copyparty/","name":"copyparty","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unknown\",\n                    \"vendor\": \"9001\",\n                    \"product\": \"copyparty\",\n                    \"collectionURL\": \"https://pypi.org/project/copyparty/\",\n                    \"packageURL\": \"pkg:github/9001/copyparty\",\n                    \"repo\": \"https://github.com/9001/copyparty\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"versionType\": \"semver\",\n                            \"lessThanOrEqual\": \"1.20.24\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","score":2.3,"severity":"LOW"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","score":3.1,"severity":"LOW"}],"references":["https://euriconicacio.github.io/blog/cve-2026-93353-a-volume-guard-enforced-one-call-site-at-a-time/","https://www.vulncheck.com/advisories/copyparty-sftp-volume-restriction-bypass-via-mkdir-rmdir-chattr-handlers"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93353","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93353","identifiers":["CVE-2026-93353"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EPSS backfill.","generation":"2026-11-11T22:56:48.8843611+00:00","complete":true,"records":1097,"lastAttemptAt":"2026-11-11T22:56:48.8843611+00:00","lastSuccessAt":"2026-11-11T22:56:49.0602607+00:00","error":null,"lastVerifiedAt":"2026-11-11T22:56:49.0602611+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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