CVE-2026-6437: CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') in Amazon AWS EFS CSI Driver
CVE-2026-6437 is a medium severity vulnerability in the AWS EFS CSI Driver before version 3.0.1. It allows remote authenticated users with PersistentVolume creation permissions to inject arbitrary mount options by exploiting improper neutralization of argument delimiters, specifically commas, in volume mount options. This argument injection flaw can lead to unauthorized command arguments being processed. AWS manages remediation for this cloud-hosted service and has released version 3.0.1 to address the issue.
AI Analysis
Technical Summary
The vulnerability CVE-2026-6437 affects the AWS EFS CSI Driver versions prior to 3.0.1. It is caused by improper neutralization of argument delimiters (CWE-88) in the handling of volume mount options, allowing remote authenticated users with PersistentVolume creation permissions to inject arbitrary mount options. This can lead to argument injection attacks during volume mounting. The CVSS v3.1 score is 6.5, reflecting medium severity with high impact on confidentiality and integrity but no impact on availability. AWS, as the vendor of this cloud service, has released version 3.0.1 to remediate the issue and manages patching for this cloud-hosted service.
Potential Impact
Successful exploitation allows remote authenticated users with PersistentVolume creation permissions to inject arbitrary mount options, potentially compromising confidentiality and integrity of the system using the AWS EFS CSI Driver. There is no reported impact on availability. The medium CVSS score (6.5) reflects a moderate risk level.
Mitigation Recommendations
AWS manages remediation for this cloud-hosted service and has released version 3.0.1 of the AWS EFS CSI Driver to address this vulnerability. Users should ensure they are using version 3.0.1 or later. Since this is a cloud service, AWS typically applies necessary patches server-side; verify the vendor advisory at https://aws.amazon.com/security/security-bulletins/2026-016-aws/ for the latest remediation guidance.
CVE-2026-6437: CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') in Amazon AWS EFS CSI Driver
Description
CVE-2026-6437 is a medium severity vulnerability in the AWS EFS CSI Driver before version 3.0.1. It allows remote authenticated users with PersistentVolume creation permissions to inject arbitrary mount options by exploiting improper neutralization of argument delimiters, specifically commas, in volume mount options. This argument injection flaw can lead to unauthorized command arguments being processed. AWS manages remediation for this cloud-hosted service and has released version 3.0.1 to address the issue.
CVSS v3.1
Score 6.5medium
Affected software
pkg:github/kubernetes-sigs/aws-efs-csi-driverRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-6437 affects the AWS EFS CSI Driver versions prior to 3.0.1. It is caused by improper neutralization of argument delimiters (CWE-88) in the handling of volume mount options, allowing remote authenticated users with PersistentVolume creation permissions to inject arbitrary mount options. This can lead to argument injection attacks during volume mounting. The CVSS v3.1 score is 6.5, reflecting medium severity with high impact on confidentiality and integrity but no impact on availability. AWS, as the vendor of this cloud service, has released version 3.0.1 to remediate the issue and manages patching for this cloud-hosted service.
Potential Impact
Successful exploitation allows remote authenticated users with PersistentVolume creation permissions to inject arbitrary mount options, potentially compromising confidentiality and integrity of the system using the AWS EFS CSI Driver. There is no reported impact on availability. The medium CVSS score (6.5) reflects a moderate risk level.
Mitigation Recommendations
AWS manages remediation for this cloud-hosted service and has released version 3.0.1 of the AWS EFS CSI Driver to address this vulnerability. Users should ensure they are using version 3.0.1 or later. Since this is a cloud service, AWS typically applies necessary patches server-side; verify the vendor advisory at https://aws.amazon.com/security/security-bulletins/2026-016-aws/ for the latest remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- AMZN
- Date Reserved
- 2026-04-16T17:42:09.910Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Is Cloud Service
- true
- Vendor Advisory Urls
- [{"url":"https://aws.amazon.com/security/security-bulletins/2026-016-aws/","vendor":"AWS"}]
Threat ID: 69e28194bdfbbecc597b95e2
Added to database: 04/17/2026, 18:53:08 UTC
Last enriched: 06/05/2026, 19:27:40 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 158
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