Unauthenticated cluster control via hardcoded gRPC token
Published Dec 30, 2025 · Updated Dec 30, 2025
Authentication bypass in RustFS 1.0.0-alpha.13 through 1.0.0-alpha.77 allows remote attackers to control clusters via the gRPC port. The check_auth interceptor in rustfs/src/server/http.rs compares every gRPC request's authorization metadata with a public, immutable string literal shared by all deployments, while the client inserts the same literal. Network access to the gRPC listener is sufficient to invoke more than 50 privileged methods that read credentials, alter policies or configuration, delete data, and interrupt the service.
Summary
What happened
Authentication bypass in RustFS 1.0.0-alpha.13 through 1.0.0-alpha.77 allows remote attackers to control clusters via the gRPC port. The check_auth interceptor in rustfs/src/server/http.rs compares every gRPC request's authorization metadata with a public, immutable string literal shared by all deployments, while the client inserts the same literal. Network access to the gRPC listener is sufficient to invoke more than 50 privileged methods that read credentials, alter policies or configuration, delete data, and interrupt the service.
The record
- CVE
- CVE-2025-68926
- Published
- Dec 30, 2025
- Updated
- Dec 30, 2025
- Vendor
- RustFS
- Product
- RustFS
- Classifications
- CWE-798, CWE-287, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 30, 2025CVE publishedPublication date reported by the CVE source.
- Dec 30, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 1.0.0-alpha.77
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- GHSA gRPC token reproductionfunctional · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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