Medium severity · published Aug 12, 2026
CVE-2026-73287
RustFS: FTPS MKD bypasses IAM CreateBucket authorization
5.4
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RU
rustfs · rustfs
< 1.0.0-beta.12 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-73287
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-73287
github.com
https://github.com/rustfs/rustfs/commit/92f83bfe155d8a3b9cdd903086e5b28d52339efb
github.com
https://github.com/rustfs/rustfs/releases/tag/1.0.0-beta.12
github.com
https://github.com/rustfs/rustfs/security/advisories/GHSA-g3vq-vv42-f647
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