CVE-2026-73287

RustFS: FTPS MKD bypasses IAM CreateBucket authorization

5.4 Medium

RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.12, RustFS handles FTPS MKD in FtpsDriver::mkd in crates/protocols/src/ftps/driver.rs by calling storage.create_bucket without authorize_operation for S3Action::CreateBucket, allowing authenticated FTPS users denied s3:CreateBucket to create buckets. This issue is fixed in version 1.0.0-beta.12.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: Low
Availability: Low

Exploit likelihood

0.37%Up 0.2 points since Aug 13, 2026

What each source reports

CVE List Score used 5.4

RustFS: FTPS MKD bypasses IAM CreateBucket authorization

Record: CVE-2026-73287
CVSS 3.1: 5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Weakness: CWE-862
Updated: 2026-11-02

EUVDEUVD-2026-57232 5.4

Record: EUVD-2026-57232
CVSS 3.1: 5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Updated: 2026-11-02

NVD 5.4

Record: CVE-2026-73287
CVSS 3.1: 5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Weakness: CWE-862
Updated: 2026-11-02

OSV 5.4

RustFS: FTPS MKD bypasses IAM CreateBucket authorization

Record: CVE-2026-73287
CVSS 3.1: 5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Weakness: CWE-862
Updated: 2026-11-02

Affected products

rustfs

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-73287 is a medium vulnerability (CVSS 5.4) in Rustfs, published August 12, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.37%, the 30th percentile. No source names a fixed version.