CVEvulnerability

CVE-2026-40937

8.3 HIGH Published 2026-04-22 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-04-22
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.3 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
Weaknesses
CWE-862

Description

RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-alpha.94, all four notification target admin API endpoints in `rustfs/src/admin/handlers/event.rs` use a `check_permissions` helper that validates authentication only (access key + session token), without performing any admin-action authorization via `validate_admin_request`. Every other admin handler in the codebase correctly calls `validate_admin_request` with a specific `AdminAction`. This is the only admin handler file that skips authorization. A non-admin user can overwrite a shared admin-defined notification target by name, causing subsequent bucket events to be delivered to an attacker-controlled endpoint. This enables cross-user event interception and audit evasion. 1.0.0-alpha.94 contains a patch.

Affected configurations

• rustfs rustfs 1.0.0

Related

Weakness · CWE (1)

  • CWE-862 Missing Authorization weakness

References