Vulnerability in Cockpit Hq Cms
CVE-2026-57855
Cockpit CMS contains a missing authorization vulnerability in the Bucket file storage API (/system/buckets/api). The api() method in modules/System/Controller/Buckets.php executes bucket commands (ls, upload, removefiles, rename, createfolder) without performing any ACL or role check. Any authenticated user, regardless of role, can perform all bucket operations on any named bucket, including buckets intended for admin use only.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (42.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Cockpit Hq Cms — versions 0
Weakness classification (CWE)
References
- github.com/cockpit-hq/cockpit (product)
- github.com/Cockpit-HQ/Cockpit/commit/dde2d1d74f5f4e11de42a298918ea8c9684f932c (patch)
- gist.github.com/sermikr0/821c4edd3c34e98a62a50b07707785bd (technical-description)
- www.vulncheck.com/advisories/cockpit-cms-missing-authorization-in-bucket-file-s… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-57855?
- CVE-2026-57855 is a high-severity vulnerability in Cockpit Hq Cms, classified under Improper Access Control. CVSS score: 8.8/10. Published 2026-07-13.
- How severe is CVE-2026-57855?
- High severity. CVSS v3 base score is 8.8 out of 10.