CVE-2026-55189

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Source
https://cve.org/CVERecord?id=CVE-2026-55189
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55189.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55189
Aliases
  • GHSA-3g29-xff2-92vp
Published
2026-06-26T19:59:13Z
Modified
2026-10-28T02:31:01Z
Severity
  • 7.7 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N CVSS Calculator
Summary
RustFS: FTP frontend skips IAM authorization on object reads
Details

RustFS is a distributed object storage system built in Rust. From 1.0.0-alpha.1 until 1.0.0-beta.9, when the FTP frontend is enabled, the FTP read and probe handlers dispatch directly to the storage backend without ever calling the IAM authorization function that the FTP write/list handlers (and the entire HTTP S3 path) use. As a result, any user who can authenticate to the FTP listener — including a user whose IAM policy contains an explicit Deny on s3:GetObject — can read (RETR) and stat (SIZE/MDTM) any object in any bucket, and probe any bucket (CWD), completely regardless of their IAM policy. This vulnerability is fixed in 1.0.0-beta.9.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-862",
        "CWE-863"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55189.json"
}
References

Affected packages

Git / github.com/rustfs/rustfs

Affected ranges

Type
GIT
Repo
https://github.com/rustfs/rustfs
Events
Introduced
6a5fbe7ef112c77cc285dcdacfffbee28a76e4a9
Fixed
a7827ed91bf14e823a4cc760ee08670b1c6c7291
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "1.0.0-alpha.1"
                },
                {
                    "last_affected":  "1.0.0-beta.8"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "1.0.0-beta.9"
                }
            ],
            "source":  "DESCRIPTION"
        }
    ]
}

Affected versions

1.*
1.0.0-alpha.1
1.0.0-alpha.10
1.0.0-alpha.11
1.0.0-alpha.12
1.0.0-alpha.13
1.0.0-alpha.14
1.0.0-alpha.15
1.0.0-alpha.16
1.0.0-alpha.17
1.0.0-alpha.18
1.0.0-alpha.19
1.0.0-alpha.2
1.0.0-alpha.20
1.0.0-alpha.21
1.0.0-alpha.22
1.0.0-alpha.23
1.0.0-alpha.24
1.0.0-alpha.25
1.0.0-alpha.26
1.0.0-alpha.27
1.0.0-alpha.28
1.0.0-alpha.29
1.0.0-alpha.3
1.0.0-alpha.30
1.0.0-alpha.31
1.0.0-alpha.32
1.0.0-alpha.33
1.0.0-alpha.34
1.0.0-alpha.35
1.0.0-alpha.36
1.0.0-alpha.37
1.0.0-alpha.38
1.0.0-alpha.39
1.0.0-alpha.4
1.0.0-alpha.40
1.0.0-alpha.41
1.0.0-alpha.42
1.0.0-alpha.43
1.0.0-alpha.44
1.0.0-alpha.45
1.0.0-alpha.46
1.0.0-alpha.47
1.0.0-alpha.48
1.0.0-alpha.49
1.0.0-alpha.5
1.0.0-alpha.50
1.0.0-alpha.51
1.0.0-alpha.52
1.0.0-alpha.53
1.0.0-alpha.54
1.0.0-alpha.55
1.0.0-alpha.56
1.0.0-alpha.57
1.0.0-alpha.58
1.0.0-alpha.59
1.0.0-alpha.6
1.0.0-alpha.60
1.0.0-alpha.61
1.0.0-alpha.62
1.0.0-alpha.63
1.0.0-alpha.64
1.0.0-alpha.65
1.0.0-alpha.66
1.0.0-alpha.67
1.0.0-alpha.68
1.0.0-alpha.69
1.0.0-alpha.7
1.0.0-alpha.70
1.0.0-alpha.71
1.0.0-alpha.72
1.0.0-alpha.73
1.0.0-alpha.74
1.0.0-alpha.75
1.0.0-alpha.76
1.0.0-alpha.77
1.0.0-alpha.78
1.0.0-alpha.79
1.0.0-alpha.8
1.0.0-alpha.80
1.0.0-alpha.81
1.0.0-alpha.82
1.0.0-alpha.83
1.0.0-alpha.84
1.0.0-alpha.85
1.0.0-alpha.86
1.0.0-alpha.87
1.0.0-alpha.88
1.0.0-alpha.89
1.0.0-alpha.9
1.0.0-alpha.90
1.0.0-alpha.91
1.0.0-alpha.92
1.0.0-alpha.93
1.0.0-alpha.94
1.0.0-alpha.95
1.0.0-alpha.96
1.0.0-alpha.97
1.0.0-alpha.98
1.0.0-alpha.99
1.0.0-beta.1
1.0.0-beta.2
1.0.0-beta.3
1.0.0-beta.4
1.0.0-beta.5
1.0.0-beta.6
1.0.0-beta.7
1.0.0-beta.8
v1.*
v1.0.0-beta.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55189.json"