CVE-2026-45039 — RustFS: Internode RPC HMAC secret falls back to public default credential, enabling peer impersonation
RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.2, the internode RPC layer authenticates every request with an HMAC-SHA256 signature using a sha…
Published: 2026-05-28 · CVSS: 9.8 · CVSS 3.1
RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.2, the internode RPC layer authenticates every request with an HMAC-SHA256 signature using a shared secret. The function that produces this secret, get_shared_secret() in crates/ecstore/src/rpc/http_auth.rs, falls back to the public, source-tree-embedded DEFAULT_SECRET_KEY = "rustfsadmin" when neither the RUSTFS_RPC_SECRET environment variable nor the global S3 secret key has been configured. This vulnerability is fixed in 1.0.0-beta.2.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7