CVE-2026-73287Public exploitNetwork attack vector

Unauthorized bucket creation via unchecked FTPS MKD

Published Aug 12, 2026 · Updated Aug 12, 2026

Missing authorization in RustFS before 1.0.0-beta.12 allows remote authenticated users to create buckets through FTPS MKD. FtpsDriver::mkd in crates/protocols/src/ftps/driver.rs calls storage.create_bucket without first invoking authorize_operation for S3Action::CreateBucket. The FTP/FTPS frontend must be enabled, and valid FTP credentials with a policy denial are enough to create unauthorized buckets and consume namespace or storage-management resources.

CVSS severity5.4
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in RustFS before 1.0.0-beta.12 allows remote authenticated users to create buckets through FTPS MKD. FtpsDriver::mkd in crates/protocols/src/ftps/driver.rs calls storage.create_bucket without first invoking authorize_operation for S3Action::CreateBucket. The FTP/FTPS frontend must be enabled, and valid FTP credentials with a policy denial are enough to create unauthorized buckets and consume namespace or storage-management resources.

The record

CVE
CVE-2026-73287
Published
Aug 12, 2026
Updated
Aug 12, 2026
Vendor
RustFS
Product
RustFS
Classifications
CWE-862
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.0.0-beta.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

RustFS · RustFSversion=< 1.0.0-beta.12

Published CVSS scores

5.4RustFS GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization

Public exploit references

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Technologies

Your stack

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Your stack

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