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CVE-2026-73284— RustFS: AddServiceAccount Handler Allows Creation of Root-Parent Service Accounts

Quick assessment

Affected
rustfs rustfs
Exploitation
Public or AI PoC available; prioritize validation
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组织开源的一款网络存储文件系统。 RustFS 1.0.0-beta.11之前版本存在权限许可和访问控制问题漏洞，该漏洞源于AddServiceAccount功能对target_user参数验证不当，仅检查CreateServiceAccountAdminAction，可能将结果根父服务账户的is_owner设置为true，导致权限提升。

CVSS 8.8 · High EPSS 0.52% · P42

Affected Version Matrix 1

VendorProduct Version RangeStatus
rustfs rustfs < 1.0.0-beta.11 affected
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I. Basic Information for CVE-2026-73284

Vulnerability Information
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Vulnerability Title
RustFS: AddServiceAccount Handler Allows Creation of Root-Parent Service Accounts
Source: CVE Program / CVE List V5
Vulnerability Description
RustFS is a distributed object storage system built in Rust. RustFS AddServiceAccount in rustfs/src/admin/handlers/service_account.rs accepts an attacker-controlled target_user after only checking CreateServiceAccountAdminAction, passes it to new_service_account, and prepare_service_account_auth sets is_owner for the resulting root-parent service account. This issue is fixed in version 1.0.0-beta.11.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
RustFS 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
RustFS是RustFS组织开源的一款网络存储文件系统。 RustFS 1.0.0-beta.11之前版本存在权限许可和访问控制问题漏洞，该漏洞源于AddServiceAccount功能对target_user参数验证不当，仅检查CreateServiceAccountAdminAction，可能将结果根父服务账户的is_owner设置为true，导致权限提升。
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.11 -

II. Public POCs for CVE-2026-73284

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Success marker: VULNERABLE: Root-parent SA created (parentUser=rustfsadmin), token=PROOF_2ccfe81dc4336898, admin API access confirmed (is_owner escalation)
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
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claude_code · 8080 chars
GitHub 复现环境（可 clone 直接跑）
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III. Intelligence Information for CVE-2026-73284

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Patches & Fixes for CVE-2026-73284 (2)

Vendor Advisories for CVE-2026-73284 (1)

Vendor Pages for CVE-2026-73284 (1)

Same Patch Batch · rustfs · 2026-08-12 · 8 CVEs total

CVE-2026-73286 8.1 HIGH RustF: Request headers can populate server-derived IAM condition keys, letting a caller sa
CVE-2026-73289 8.1 HIGH RustFS: ForAllValues/ForAnyValue negated string conditions are transposed, inverting IAM a
CVE-2026-73285 7.5 HIGH RustFS: OPA policy plugin omits ExistingObjectTag conditions, allowing tag-based authoriza
CVE-2026-73265 6.5 MEDIUM RustFS: Version-specific object reads authorize the non-version action
CVE-2026-73288 6.1 MEDIUM RustFS: Object Lock (WORM) protections are treated as absent when bucket metadata cannot b
CVE-2026-73287 5.4 MEDIUM RustFS: FTPS MKD bypasses IAM CreateBucket authorization
CVE-2026-73290 5.3 MEDIUM RustFS: Anonymous ListObjectVersions bypasses RestrictPublicBuckets through the ListBucket

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-73284

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