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CVE-2026-45041— RustFS: Hard-coded RSA private key in license verifier permits arbitrary license forgery

Quick assessment

Affected
rustfs rustfs
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

rustfs是RustFS开源的一个高性能对象存储系统。 RustFS 1.0.0-beta.2之前版本存在安全漏洞，该漏洞源于使用嵌入的测试私钥进行许可证验证，允许任何人伪造任意许可证令牌。

AI Predicted 7.5 Difficulty: Trivial EPSS 0.41% · P33

Affected Version Matrix 1

VendorProduct Version RangeStatus
rustfs rustfs < 1.0.0-beta.2 affected
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I. Basic Information for CVE-2026-45041

Vulnerability Information
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Vulnerability Title
RustFS: Hard-coded RSA private key in license verifier permits arbitrary license forgery
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
使用硬编码的密码学密钥
Source: CVE Program / CVE List V5
Vulnerability Title
rustfs 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
rustfs是RustFS开源的一个高性能对象存储系统。 RustFS 1.0.0-beta.2之前版本存在安全漏洞，该漏洞源于使用嵌入的测试私钥进行许可证验证，允许任何人伪造任意许可证令牌。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
rustfs rustfs < 1.0.0-beta.2 -

II. Public POCs for CVE-2026-45041

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III. Intelligence Information for CVE-2026-45041

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Vendor Advisories for CVE-2026-45041 (1)

Same Patch Batch · rustfs · 2026-05-28 · 7 CVEs total

CVE-2026-45039 9.8 CRITICAL RustFS: Internode RPC HMAC secret falls back to public default credential, enabling peer i
CVE-2026-45044 RustFS: Authentication bypass in /profile/cpu and /profile/memory allows unauthenticated a
CVE-2026-45042 RustFS: UploadPartCopy Does Not Enforce Destination Bucket Policy on Copy Source
CVE-2026-45040 RustFS: Sensitive Information Leakage (SessionToken and SecretAccessKey) in RustFS Logs [D
CVE-2026-47136 RustFS: Unauthenticated RustFS console license endpoint exposes license metadata
CVE-2026-46685 RustFS: Reflective CORS with credentials on S3 listener; unauthenticated license metadata

IV. Related Vulnerabilities

Same product: rustfs
Same vendor: rustfs
Same weakness: CWE-321

V. Comments for CVE-2026-45041

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