EUVD-2026-57228Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Requires authenticated low-privileged account with CreateServiceAccountAdminAction; single network API call with no complexity, interaction, or scope crossing needed.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
4DescriptionCVE.org
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.
AnalysisAI
Privilege escalation in RustFS prior to version 1.0.0-beta.11 allows any authenticated user holding CreateServiceAccountAdminAction to create a root-parented service account by supplying an arbitrary target_user to the AddServiceAccount API, because the handler validates only the permission and never enforces scope - and prepare_service_account_auth automatically grants is_owner status to root-parented accounts. The resulting credential provides full owner-level access to all objects in the distributed storage cluster. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to possess a valid RustFS credential that has been explicitly granted the CreateServiceAccountAdminAction permission. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is high and the CVSS 8.8 score (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately represents the threat profile. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An authenticated API user - such as a developer or CI/CD service account - that has been delegated CreateServiceAccountAdminAction sends an AddServiceAccount request with target_user set to the root credential key ('rustfsadmin'). The unpatched handler passes this value unchecked to new_service_account, and prepare_service_account_auth creates a fully owner-privileged service account credential. … |
| Remediation | Upgrade to RustFS version 1.0.0-beta.11 or later, which is confirmed patched per the vendor release at https://github.com/rustfs/rustfs/releases/tag/1.0.0-beta.11 and the upstream fix at commit 9866f68d86482b3de7e0058a908727c3815e72b9. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all RustFS deployments in production and non-production environments and determine their current versions; generate a complete inventory of all users and service accounts holding the CreateServiceAccountAdminAction permission and document their business justification. …
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Same weakness CWE-269 – Improper Privilege Management
View allSame technique Privilege Escalation
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External POC / Exploit Code
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