CVE-2026-22043
Medium · 6.5RustFS has IAM deny_only Short-Circuit that Allows Privilege Escalation via Service Account Minting
CVSS
6.5
EPSS
0.4%
Published
Jan 8, 2026
CISA due date
—
The record
A flawed `deny_only` short-circuit in RustFS IAM allows a restricted service account or STS credential to self-issue an unrestricted service account, inheriting the parent’s full privileges. This enables privilege escalation and bypass of session/inline policy restrictions.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| crates.io | rustfs | 1.0.0-alpha.13 | 1.0.0-alpha.79 |
| cargo | rustfs | 1.0.0-alpha.13 | 1.0.0-alpha.79 |
Related vulnerabilities
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