What is CVE-2026-45039?

CVE-2026-45039 is a critical-severity vulnerability in Rustfs, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2026-05-28.

How severe is CVE-2026-45039?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Rustfs

CVE-2026-45039

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…

EPSS: 0.001 (17.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Rustfs — versions < 1.0.0-beta.2

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials
CWE-1392

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-45039?: CVE-2026-45039 is a critical-severity vulnerability in Rustfs, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2026-05-28.
How severe is CVE-2026-45039?: Critical severity. CVSS v3 base score is 9.8 out of 10.