CVE-2026-73287

MEDIUM 5.4

RustFS: FTPS MKD bypasses IAM CreateBucket authorization

CVSS Score

5.4

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-862
Vendor	rustfs
Product	rustfs
Published	Aug 12, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

Low

Affected Versions

rustfs / rustfs

< 1.0.0-beta.12

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/rustfs/rustfs/security/advisories/GHSA-g3vq-vv42-f647 github.com: https://github.com/rustfs/rustfs/commit/92f83bfe155d8a3b9cdd903086e5b28d52339efb github.com: https://github.com/rustfs/rustfs/releases/tag/1.0.0-beta.12