CVE-2026-45040

RustFS: Sensitive Information Leakage (SessionToken and SecretAccessKey) in RustFS Logs [Debug Mode]

MEDIUM

5.3

CVSS Score

Published: May 28, 2026 at 06:35 PM UTC

Updated: June 17, 2026 at 10:51 AM UTC

1 product affected across 1 vendorRustfs

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Severity

MEDIUM5.3

Exploit prediction

EPSS 0.2%

SSVC

PoC

Description

RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.2, RustFS suffers from sensitive information leakage in log outputs. When the server is run with RUST_LOG=debug sensitive credentials including SessionToken (JWT), SecretAccessKey, and full JWT claims are printed in plaintext to the server logs. This vulnerability is fixed in 1.0.0-beta.2.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Rustfs · Rustfscargo

60%

v < 1.0.0-beta.2

Affected range stops below 1.0.0-beta.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_CONFIRM

Source: cverecord

https://github.com/rustfs/rustfs/security/advisories/GHSA-8cm2-h255-v749

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMGitHub_M

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-312CWE-532

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