PT-2026-57916 · Cockpit Hq · Cockpit Cms

Saidakbarxon Maxsudxonov · Published 2026-07-13 · Updated 2026-07-13 · CVE-2026-57856

Mitre

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2026-57856

Affected Products

Cockpit Cms

References · 6

• https://github.com/Cockpit-HQ/Cockpit/commit/dde2d1d74f5f4e11de42a298918ea8c9684f932c · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-57856 · Security Note
• https://github.com/cockpit-hq/cockpit · Note
• https://vulncheck.com/advisories/cockpit-cms-missing-authorization-in-bucket-file-storage-api · Note
• https://vulncheck.com/advisories/cockpit-cms-path-traversal-via-bucket-name-in-bucket-file-storage-api · Note
• https://gist.github.com/sermikr0/821c4edd3c34e98a62a50b07707785bd · Note