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Vulnerability record · CVE-2026-45043 · published 29 May 2026

CVE-2026-45043: Improper privilege management vulnerability

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.

9.3 CVSS 4.0 Critical EPSS 0.35% · top 73.9% CWE-269 · Improper privilege managementCWE-284 · Improper access control Deferred
9.3CVSS 4.0 base score
0.35%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
21 Jul 2026Last modified by NVD

Description

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/rustfs/rustfs/security/advisories/GHSA-566f-q62r-wcr8
https://github.com/rustfs/rustfs/security/advisories/GHSA-566f-q62r-wcr8

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Source: NIST National Vulnerability Database (record CVE-2026-45043), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.