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CVE-2026-55189

HIGH
7.7
CVSS 3.1
Description
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.

Metadata

CVE ID
CVE-2026-55189
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-16 15:20 UTC
Published
2026-06-26 19:59 UTC
Last updated
2026-06-26 19:59 UTC
Primary CWE
CWE-862
CWE-862: Missing Authorization
Vendor / Product
rustfs / rustfs
Sources
cve.org  ·  NVD

Severity & Metrics

7.7 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Affected products (1)
VendorProductPlatformVersions
rustfs rustfs — >= 1.0.0-alpha.1, <= 1.0.0-beta.8
Weakness (CWE)
CWESourceDescription
CWE-862 cna CWE-862: Missing Authorization
CWE-863 cna CWE-863: Incorrect Authorization
CVSS scores (1)
ScoreSeverityVersionSourceVector
7.7 HIGH 3.1 cna CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
References (1)
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