---
id: CVE-2026-103505
title: AWS EFS CSI Driver Mount Option Injection via mounttargetipmap
summary: >-
  Improper neutralization of argument delimiters in the volume handling
  component in AWS EFS CSI Driver (aws-efs-csi-driver) v3.1.0 through v3.4.2
  might allow remote authenticated users with PersistentVolume creation
  permissions to inject …
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N'
cvssSource: cna
cwe:
  - CWE-88
vendor: AWS
product: aws-efs-csi-driver
affected:
  - aws-efs-csi-driver >= 3.1.0 <= 3.4.2
published: '2026-10-01'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T15:36:04.355Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-103505'
references:
  - url: 'https://github.com/kubernetes-sigs/aws-efs-csi-driver/releases/tag/v3.5.0'
  - url: 'https://aws.amazon.com/security/security-bulletins/2026-120-aws/'
tags:
  - cve.org
ingestedAt: '2026-10-01T15:48:17.832Z'
---

## Overview

Improper neutralization of argument delimiters in the volume handling component in AWS EFS CSI Driver (aws-efs-csi-driver) v3.1.0 through v3.4.2 might allow remote authenticated users with PersistentVolume creation permissions to inject arbitrary mount options via comma-separated values in the mounttargetipmap volumeAttribute.



To remediate this issue, users should upgrade to version v3.5.0 or later.

## Affected

- `aws-efs-csi-driver >= 3.1.0 <= 3.4.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.