{"id":"CVE-2026-57856","state":"PUBLISHED","title":"Cockpit CMS Path Traversal via Bucket Name in Bucket File Storage API","description":"Cockpit CMS contains a path traversal vulnerability in the Bucket file storage API (/system/buckets/api). The api() method in modules/System/Controller/Buckets.php sanitizes the bucket name with preg_replace('/[^a-zA-Z0-9-_\\\\.]/','', $bucket), which permits '..' and '../' sequences. The sanitized value is interpolated into a Flysystem path as uploads://buckets/{bucket}. Flysystem's WhitespacePathNormalizer resolves 'buckets/..' to the empty string (the uploads storage root) without raising PathTraversalDetected because the '..' has a preceding component to consume. An authenticated low-privileged user can send a crafted request with a '../' bucket name to list, upload, and delete files across all buckets, including those belonging to other users or roles","publishedAt":"2026-07-13T22:41:23.183Z","updatedAt":"2026-07-14T21:34:35.949Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["Cockpit HQ Cockpit CMS"],"affected":[{"vendor":"Cockpit HQ","product":"Cockpit CMS","defaultStatus":"affected","versions":[{"version":"0","status":"affected","lessThan":"2.14.0","versionType":"git"}]}],"references":["https://github.com/cockpit-hq/cockpit","https://github.com/Cockpit-HQ/Cockpit/commit/dde2d1d74f5f4e11de42a298918ea8c9684f932c","https://gist.github.com/sermikr0/821c4edd3c34e98a62a50b07707785bd","https://www.vulncheck.com/advisories/cockpit-cms-missing-authorization-in-bucket-file-storage-api","https://www.vulncheck.com/advisories/cockpit-cms-path-traversal-via-bucket-name-in-bucket-file-storage-api"],"weaknesses":["CWE-22"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/57xxx/CVE-2026-57856.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-57856","state":"PUBLISHED","datePublished":"2026-07-13T22:41:23.183Z","dateUpdated":"2026-07-14T21:34:35.949Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-06-25T18:48:00.282Z"},"containers":{"cna":{"title":"Cockpit CMS Path Traversal via Bucket Name in Bucket File Storage API","descriptions":[{"lang":"en","value":"Cockpit CMS contains a path traversal vulnerability in the Bucket file storage API (/system/buckets/api). The api() method in modules/System/Controller/Buckets.php sanitizes the bucket name with preg_replace('/[^a-zA-Z0-9-_\\\\.]/','', $bucket), which permits '..' and '../' sequences. The sanitized value is interpolated into a Flysystem path as uploads://buckets/{bucket}. Flysystem's WhitespacePathNormalizer resolves 'buckets/..' to the empty string (the uploads storage root) without raising PathTraversalDetected because the '..' has a preceding component to consume. 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