CVEvulnerability

CVE-2026-55189

7.7 HIGH Published 2026-06-26 Modified 2026-06-29 Official page ↗
Status
Deferred
Published
2026-06-26
Last modified
2026-06-29
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.7 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Weaknesses
CWE-862, CWE-863

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.

Related

Weakness · CWE (2)

  • CWE-862 Missing Authorization weakness
  • CWE-863 Incorrect Authorization weakness

References