RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.2, when RUSTFS_CORS_ALLOWED_ORIGINS is unset, the RustFS S3 listener's ConditionalCorsLayer reflects any request Origin value back as Access-Control-Allow-Origin and also sets Access-Control-Allow-Credentials: true and Access-Control-Allow-Headers: * on responses, including preflight responses and error responses. This creates a permissive cross-domain policy with untrusted origins. A browser visiting an attacker-controlled page can issue credentialed cross-origin requests to a reachable RustFS deployment and read the response when the victim browser has ambient credentials for the RustFS origin, such as saved HTTP Basic Auth credentials, reverse-proxy SSO cookies, or TLS client certificates. This vulnerability is fixed in 1.0.0-beta.2.
CVSS
No CVSS.
References
Configurations
No configuration.
History
28 May 2026, 20:16
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/rustfs/rustfs/security/advisories/GHSA-x5xv-223c-8vm7 - |
28 May 2026, 19:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-28 19:16
Updated : 2026-05-29 15:11
NVD link : CVE-2026-46685
Mitre link : CVE-2026-46685
CVE.ORG link : CVE-2026-46685
JSON object : View
Products Affected
No product.