CVE-2026-22042 — HIGH (8.8)

Vulnerability Description

RustFS is a distributed object storage system built in Rust. Prior to version 1.0.0-alpha.79, he `ImportIam` admin API validates permissions using `ExportIAMAction` instead of `ImportIAMAction`, allowing a principal with export-only IAM permissions to perform import operations. Since importing IAM data performs privileged write actions (creating/updating users, groups, policies, and service accounts), this can lead to unauthorized IAM modification and privilege escalation. Version 1.0.0-alpha.79 fixes the issue.

CVSS Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Rustfs	Rustfs	1.0.0

Related Weaknesses (CWE)

CWE-285 CWE-863

References

https://github.com/rustfs/rustfs/security/advisories/GHSA-vcwh-pff9-64ccExploitVendor Advisory
https://github.com/rustfs/rustfs/security/advisories/GHSA-vcwh-pff9-64ccExploitVendor Advisory

FAQ

What is CVE-2026-22042?

CVE-2026-22042 is a vulnerability with a CVSS score of 8.8 (HIGH). RustFS is a distributed object storage system built in Rust. Prior to version 1.0.0-alpha.79, he `ImportIam` admin API validates permissions using `ExportIAMAction` instead of `ImportIAMAction`, allow...

How severe is CVE-2026-22042?

CVE-2026-22042 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-22042?

Check the references section above for vendor advisories and patch information. Affected products include: Rustfs Rustfs.