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CVE-2026-22042

RustFS has IAM Incorrect Authorization in ImportIam that Allows Privilege Escalation

Published: Jan 8, 2026Updated: Jan 15, 2026 Sources: CVE List NVD GHSACWE-285
NVD MITRE
8.8CVSSHIGH
EPSS Score
0.4%
Top 69.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-285CWE-863

Affected Products

rustfsrustfs
Library
OSS Libraries / generic-library
rustfscrates.ioOSS Libraries
rustfsoss-projectOSS Librariesaka rustfs
crates.iopackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
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References

https://github.com/rustfs/rustfs/security/advisories/GHSA-vcwh-pff9-64cc
github.com
https://nvd.nist.gov/vuln/detail/CVE-2026-22042
nvd.nist.gov
https://github.com/rustfs/rustfs
github.com

Timeline

Published
Jan 8, 2026
Last Updated
Jan 15, 2026

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