CVE-2026-45043CWE-269CWE-284

RustFS: ImportIam Allows Creation of Backdoor Service Accounts Under Any Parent Including Root

Critical · published May 29, 2026

CVSS v4.0
9.3
EPSS
0%
Percentile
27.5
In the wild
Unconfirmed
What it is

RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.2, improper validation in the PUT /rustfs/admin/v3/import-iam endpoint allows a user with ImportIAMAction to create service accounts under arbitrary parent identities, including the root user (minioadmin). The endpoint accepts attacker-controlled parent, claims, accessKey, and secretKey values without enforcing privilege boundaries or sanitization. This enables privilege escalation to full administrative access using a persistent, attacker-defined credential. This vulnerability is fixed in 1.0.0-beta.2.

The record
Technical detail
CVSS v4.0
9.3 · CRITICAL
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
EPSS
0.00351 · 27.5th percentile
Weaknesses
CWE-269 · Improper Privilege Management; CWE-284 · Improper Access Control
Published
2026-05-29T12:25Z
EPSS history
Timeline
  • 29 MAY 12:25Z
    RustFS: ImportIam Allows Creation of Backdoor Service Accounts Under Any Parent Including Root
    cvelistv5