CVE-2026-57856

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Source
https://cve.org/CVERecord?id=CVE-2026-57856
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-57856.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-57856
Published
2026-07-13T22:41:23Z
Modified
2026-10-28T02:30:29Z
Severity
  • 8.7 (High) CVSS_V4 - 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 CVSS Calculator
Summary
Cockpit CMS Path Traversal via Bucket Name in Bucket File Storage API
Details

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

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-22"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57856.json"
}
References

Affected packages

Git / github.com/cockpit-hq/cockpit

Affected ranges

Type
GIT
Repo
https://github.com/cockpit-hq/cockpit
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
dde2d1d74f5f4e11de42a298918ea8c9684f932c
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "2.14.0"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "fixed": "dde2d1d74f5f4e11de42a298918ea8c9684f932c"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

2.*
2.0.0
2.0.1
2.0.2
2.1.0
2.1.1
2.1.2
2.10.0
2.10.1
2.10.2
2.10.3
2.11.0
2.11.1
2.11.2
2.11.3
2.11.4
2.12.0
2.12.1
2.13.0
2.13.1
2.13.2
2.13.3
2.13.4
2.13.5
2.2.0
2.2.1
2.2.2
2.3.0
2.3.1
2.3.2
2.3.3
2.3.4
2.3.5
2.3.6
2.3.7
2.3.8
2.3.9
2.4.0
2.4.1
2.5.0
2.5.1
2.5.2
2.6.0
2.6.1
2.6.2
2.6.3
2.7.0
2.7.1
2.7.2
2.8.0
2.8.1
2.8.2
2.8.3
2.8.4
2.8.5
2.8.6
2.9.0
2.9.1
2.9.2
2.9.3
2.9.4

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-57856.json"