CVE-2026-45039

critical · 9.8

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.

9.8

CVSS

0.3%

EPSS (exploit prob.)

19th

EPSS percentile

2026-05-28

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-798CWE-1392

References

https://github.com/rustfs/rustfs/security/advisories/GHSA-r5qv-rc46-hv8q

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-45039