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CVE-2026-45043— RustFS: ImportIam Allows Creation of Backdoor Service Accounts Under Any Parent Including Root

Quick assessment

Affected
rustfs rustfs
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

rustfs是RustFS开源的一个高性能对象存储系统。 rustfs 1.0.0-beta.2之前版本存在访问控制错误漏洞，该漏洞源于PUT /rustfs/admin/v3/import-iam端点验证不当，允许具有ImportIAMAction的用户在任意父身份下创建服务账户，包括root用户，可能导致权限提升至完全管理访问。

AI Predicted 8.1 Difficulty: Easy EPSS 0.35% · P26

Affected Version Matrix 1

VendorProduct Version RangeStatus
rustfs rustfs < 1.0.0-beta.2 affected
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I. Basic Information for CVE-2026-45043

Vulnerability Information
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Vulnerability Title
RustFS: ImportIam Allows Creation of Backdoor Service Accounts Under Any Parent Including Root
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
rustfs 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
rustfs是RustFS开源的一个高性能对象存储系统。 rustfs 1.0.0-beta.2之前版本存在访问控制错误漏洞，该漏洞源于PUT /rustfs/admin/v3/import-iam端点验证不当，允许具有ImportIAMAction的用户在任意父身份下创建服务账户，包括root用户，可能导致权限提升至完全管理访问。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
rustfs rustfs < 1.0.0-beta.2 -

II. Public POCs for CVE-2026-45043

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III. Intelligence Information for CVE-2026-45043

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Vendor Advisories for CVE-2026-45043 (1)

IV. Related Vulnerabilities

Same product: rustfs
Same vendor: rustfs
Same weakness: CWE-269

V. Comments for CVE-2026-45043

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