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CVE-2026-45039

CRITICAL
9.8
CVSS 3.1
Description
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.

Metadata

CVE ID
CVE-2026-45039
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-05-08 18:07 UTC
Published
2026-05-28 18:39 UTC
Last updated
2026-05-30 02:11 UTC
Primary CWE
CWE-798
CWE-798: Use of Hard-coded Credentials
Vendor / Product
rustfs / rustfs
Sources
cve.org  ·  NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
none
Automatable
yes
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
rustfs rustfs — < 1.0.0-beta.2
Weakness (CWE)
CWESourceDescription
CWE-1392 cna CWE-1392: Use of Default Credentials
CWE-798 cna CWE-798: Use of Hard-coded Credentials
CVSS scores (1)
ScoreSeverityVersionSourceVector
9.8 CRITICAL 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References (1)
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