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.

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.

EPSS: 0.005 (42.2th percentile) — read the EPSS interpretation.

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.

Affected products

Cockpit Hq Cms — versions 0

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

disclosure@vulncheck.com (product)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com (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.