CVE-2026-73287 PUBLISHED

RustFS: FTPS MKD bypasses IAM CreateBucket authorization

Assigner: GitHub_M
Reserved: 11.08.2026 Published: 12.08.2026 Updated: 12.08.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
CVSS Score: 5.4

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	Low	Integrity Impact	Low
User Interaction	None	Availability Impact	Low

CVSS 3.1

Product Status

Vendor	rustfs
Product	rustfs
Versions	Version < 1.0.0-beta.12 is affected

References

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

Problem Types

CWE-862: Missing Authorization CWE