CVE-2026-22043

CRITICAL SEVERITY

CVSS Score & Metrics

Base Score

9.8 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H                                    

Vulnerability Description

RustFS is a distributed object storage system built in Rust. In versions 1.0.0-alpha.13 through 1.0.0-alpha.78, a flawed `deny_only` short-circuit in RustFS IAM allows a restricted service account or STS credential to self-issue an unrestricted service account, inheriting the parent’s full privileges. This enables privilege escalation and bypass of session/inline policy restrictions. Version 1.0.0-alpha.79 fixes the issue.

Vulnerability Details

Published Date

January 08, 2026

Last Modified

January 15, 2026

CWE ID

CWE-269

Source

NVD

Vendor

rustfs

Product

rustfs

External References

https://github.com/rustfs/rustfs/security/advisories/GHSA-xgr5-qc6w-vcg9
https://github.com/rustfs/rustfs/security/advisories/GHSA-xgr5-qc6w-vcg9

CVE-2026-22043

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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