Authorization Bypass in RustFS Distributed Object Storage System by Rust
CVE-2026-55188

8.2HIGH

Key Information:

Vendor

Rustfs

Status
Rustfs
Vendor
CVE Published:
26 June 2026

What is CVE-2026-55188?

RustFS, a distributed object storage system built in Rust, contains an authorization bypass vulnerability in its bucket replication admin API from versions 1.0.0-alpha.1 to 1.0.0-beta.9. The issue arises in the ListRemoteTargetHandler, which inadequately checks permissions for users. As a result, authenticated users lacking proper bucket or admin permissions can list remote replication targets, potentially exposing critical replication access keys and secret keys. This vulnerability has been rectified in version 1.0.0-beta.9.

Affected Version(s)

rustfs >= 1.0.0-alpha.1, <= 1.0.0-beta.8

References

https://github.com/rustfs/rustfs/security/advisories/GHSA...
x_refsource_CONFIRM

CVSS V3.1

Score:
8.2
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.