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

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-12 · updated 2026-09-09
Weakness: CWE-269

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.

Affected products

rustfs: before 1.0.0-beta.11

References

https://github.com/rustfs/rustfs/commit/9866f68d86482b3de7e0058a908727c3815e72b9
https://github.com/rustfs/rustfs/pull/5141
https://github.com/rustfs/rustfs/releases/tag/1.0.0-beta.11
https://github.com/rustfs/rustfs/security/advisories/GHSA-5354-r3w2-34m8

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