CVE-2026-22043

CRITICAL
2026-01-08 [email protected] GHSA-xgr5-qc6w-vcg9
9.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Patch Released
Mar 31, 2026 - 21:13 nvd
Patch available
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Jan 15, 2026 - 21:13 vuln.today
Public exploit code
CVE Published
Jan 08, 2026 - 15:15 nvd
CRITICAL 9.8

Tags

Privilege Escalation Rustfs

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.

Analysis

RustFS (alpha.13 to alpha.78) has a privilege escalation where restricted service accounts can self-issue unrestricted credentials by exploiting a flawed deny_only check in the IAM system. PoC available, patch available.

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Remediation

Within 24 hours: Identify all affected systems running Rust. In and apply vendor patches immediately. …

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Priority Score

69
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +49
POC: +20

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CVE-2026-22043 vulnerability details – vuln.today
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