CVE-2026-45043Public exploitNetwork attack vector

Administrative takeover via unchecked service-account import

Published May 29, 2026 · Updated May 29, 2026

Improper access control in RustFS before 1.0.0-beta.2 allows remote authenticated users to gain full administrative access via IAM import. The ImportIam handler provisions ZIP-supplied service accounts with attacker-controlled parent, claims, accessKey, and secretKey fields without AddServiceAccount safeguards. ImportIAMAction is required; exploitation binds a persistent chosen credential to the root identity, enabling control of buckets, IAM configuration, and administration.

CVSS severity9.3
Critical
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in RustFS before 1.0.0-beta.2 allows remote authenticated users to gain full administrative access via IAM import. The ImportIam handler provisions ZIP-supplied service accounts with attacker-controlled parent, claims, accessKey, and secretKey fields without AddServiceAccount safeguards. ImportIAMAction is required; exploitation binds a persistent chosen credential to the root identity, enabling control of buckets, IAM configuration, and administration.

The record

CVE
CVE-2026-45043
Published
May 29, 2026
Updated
May 29, 2026
Vendor
RustFS
Product
RustFS
Classifications
CWE-269, CWE-284, T1098.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 29, 2026CVE publishedPublication date reported by the CVE source.
  2. May 29, 2026Record 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.

  1. Affected versionversion=< 1.0.0-beta.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

RustFS · RustFSversion=< 1.0.0-beta.2

Published CVSS scores

9.3GitHub, Inc.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

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-269Improper Privilege Management
CWE-284Improper Access Control
T1098.001Account Manipulation: Additional Cloud Credentials

Public exploit references

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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