Authentication Flaw in RustFS Distributed Object Storage System
CVE-2026-45039

9.8CRITICAL

Key Information:

Vendor

Rustfs

Status
Rustfs
Vendor
CVE Published:
28 May 2026

What is CVE-2026-45039?

RustFS, a distributed object storage system developed in Rust, has an authentication vulnerability in its internode RPC layer. The issue arises when the system falls back to a default shared secret, 'rustfsadmin', if neither the RUSTFS_RPC_SECRET environment variable nor a global S3 secret key is configured. This could potentially allow unauthorized access, compromising the integrity of the stored data. It is recommended to upgrade to version 1.0.0-beta.2 or later to mitigate this risk.

Affected Version(s)

rustfs < 1.0.0-beta.2

References

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

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.