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CVE-2026-57855

8.8 · HIGH

Cockpit CMS contains a missing authorization vulnerability in the Bucket file storage API (/system/buckets/api).

Published Jul 13, 2026CWE-284EPSS 0.52%

Overview

CVE-2026-57855 is a high-severity vulnerability. It was published on July 13, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgist.github.com/sermikr0/821c4edd3c34e98a62a50b07707785bdGitHubgithub.com/Cockpit-HQ/Cockpit/commit/dde2d1d74f5f4e11de42a298918ea8c9684f932cGitHubgithub.com/cockpit-hq/cockpitRefwww.vulncheck.com/advisories/cockpit-cms-missing-authorization-in-bucket-file-storage-apiGitHubgist.github.com/sermikr0/821c4edd3c34e98a62a50b07707785bd

How CyberStrike helps

Frequently asked questions

What is CVE-2026-57855?

CVE-2026-57855 is a high-severity vulnerability. It was published on July 13, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-57855?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-57855?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-57855?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-57855 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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