What’s Vulnerable › Vulnerabilities

CVE-2026-73287: RustFS: FTPS MKD bypasses IAM CreateBucket authorization

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-12 · updated 2026-09-09
• Weakness: CWE-862

Description

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.

Affected products

• rustfs: before 1.0.0-beta.12

References

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

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