CVE-2026-22043

CRITICAL

9.8

Description

RustFS is a distributed object storage system built in Rust. In versions 1.0.0-alpha.13 through 1.0.0-alpha.78, a flawed `deny_only` short-circuit in RustFS IAM allows a restricted service account or STS credential to self-issue an unrestricted service account, inheriting the parent’s full privileges. This enables privilege escalation and bypass of session/inline policy restrictions. Version 1.0.0-alpha.79 fixes the issue.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published1/8/2026

Last Modified1/15/2026

Sourcenvd

Honeypot Sightings0

Affected Products

rustfs:rustfs

Weaknesses (CWE)

CWE-269CWE-284CWE-522

References

https://github.com/rustfs/rustfs/security/advisories/GHSA-xgr5-qc6w-vcg9(security-advisories@github.com)

https://github.com/rustfs/rustfs/security/advisories/GHSA-xgr5-qc6w-vcg9(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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