Privilege Escalation Vulnerability in RustFS Distributed Object Storage System
CVE-2026-22043

5.7MEDIUM

Key Information:

Vendor

Rustfs

Status
Rustfs
Vendor
CVE Published:
8 January 2026

What is CVE-2026-22043?

A flaw in the deny_only short-circuit within the RustFS IAM allows unauthorized service accounts to generate unrestricted accounts with full privileges. This vulnerability enables attackers to escalate their privileges and bypass session and inline policy restrictions, posing a significant security risk to systems utilizing RustFS versions 1.0.0-alpha.13 through 1.0.0-alpha.78. The issue has been rectified in version 1.0.0-alpha.79.

Affected Version(s)

rustfs >= 1.0.0-alpha.13, < 1.0.0-alpha.79

References

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

CVSS V4

Score:
5.7
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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