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CVE PROGRAM SOURCE RECORD5.7 Medium

CVE-2026-22043

RustFS has IAM deny_only Short-Circuit that Allows Privilege Escalation via Service Account Minting

Description

RustFS is a distributed object storage system built in Rust. In versions 1.0.0-alpha.13 through 1.0.0-alpha.78, 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. Version 1.0.0-alpha.79 fixes the issue.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

rustfs rustfs

  • >= 1.0.0-alpha.13, < 1.0.0-alpha.79affected

References