CVE-2026-45043

RustFS: ImportIam Allows Creation of Backdoor Service Accounts Under Any Parent Including Root

State: Published
Severity: 9.3 Critical
Published: May 29, 2026
Updated: Jun 2, 2026
Reserved: May 8, 2026

Description

RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.2, improper validation in the PUT /rustfs/admin/v3/import-iam endpoint allows a user with ImportIAMAction to create service accounts under arbitrary parent identities, including the root user (minioadmin). The endpoint accepts attacker-controlled parent, claims, accessKey, and secretKey values without enforcing privilege boundaries or sanitization. This enables privilege escalation to full administrative access using a persistent, attacker-defined credential. This vulnerability is fixed in 1.0.0-beta.2.

Scores

CVSS	Score	Vector	Source
4.0	9.3 Critical	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N	GitHub_M

Weaknesses

CWE-269 Improper Privilege Management
CWE-284 Improper Access Control

Affected Products

Product	Versions
rustfsrustfs	< 1.0.0-beta.2Affected

References

https://github.com/rustfs/rustfs/security/advisories/GHSA-566f-q62r-wcr8

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