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.
References
| Link | Resource |
|---|---|
| https://github.com/rustfs/rustfs/releases/tag/1.0.0-alpha.94 | Product Release Notes |
| https://github.com/rustfs/rustfs/security/advisories/GHSA-pfcq-4gjr-6gjm | Mitigation Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
No history.
Information
Published : 2026-04-22 21:17
Updated : 2026-06-17 10:45
NVD link : CVE-2026-40937
Mitre link : CVE-2026-40937
CVE.ORG link : CVE-2026-40937
JSON object : View
Products Affected
rustfs
- rustfs
CWE
CWE-862
Missing Authorization
