CVE-2026-55189 - RustFS: FTP frontend skips IAM authorization on object reads

CVE-2026-55189 - RustFS: FTP frontend skips IAM authorization on object reads

https://cvefeed.io/rssfeed/latest.atom / Sat, 06/27/2026 - 01:02
CVE ID :CVE-2026-55189
Published : June 26, 2026, 7:59 p.m. | 2 hours, 42 minutes ago
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.
Severity: 0.0 | NA
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