CVE-2026-45041

RustFS: Hard-coded RSA private key in license verifier permits arbitrary license forgery

State: Published
Severity: 8.7 High
Published: May 28, 2026
Updated: May 29, 2026
Reserved: May 8, 2026

Description

RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.2, crates/appauth/src/token.rs ships a 2048-bit RSA private key as a string constant named TEST_PRIVATE_KEY and uses it in production via parse_license() to "verify" license tokens. Because the key is embedded in every published source release and binary, anyone who can read the repository or extract it from the binary can mint arbitrary license tokens (any subject, any expiration). When the license Cargo feature is enabled, this defeats the entire license-enforcement mechanism. This vulnerability is fixed in 1.0.0-beta.2.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-321 Use of Hard-coded Cryptographic Key

Affected Products

Product	Versions
rustfsrustfs	< 1.0.0-beta.2Affected

References

https://github.com/rustfs/rustfs/security/advisories/GHSA-923g-jp7v-f97f

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