CVE-2026-103505: CWE-88 Improper neutralization of argument delimiters in a command ('argument injection') in AWS aws-efs-csi-driver
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.
AI Analysis
Technical Summary
The vulnerability identified as CVE-2026-103505 affects the AWS EFS CSI Driver from versions 3.1.0 through 3.4.2. It involves improper neutralization of argument delimiters (CWE-88) in the volume handling component, specifically in the mounttargetipmap volumeAttribute. Remote authenticated users who have permissions to create PersistentVolumes can exploit this to inject arbitrary mount options via comma-separated values, potentially impacting confidentiality and integrity. AWS has published an advisory and recommends upgrading to version 3.5.0 or later to remediate this issue.
Potential Impact
Successful exploitation allows remote authenticated users with PersistentVolume creation permissions to inject arbitrary mount options, which can compromise confidentiality and integrity of the system. The CVSS v3.1 base score is 6.5 (medium severity) with network attack vector, low attack complexity, high privileges required, no user interaction, and impacts on confidentiality and integrity but not availability.
Mitigation Recommendations
A fix is available. Users should upgrade the AWS EFS CSI Driver to version 3.5.0 or later as recommended by AWS in their security advisory. Since this is a cloud service component, AWS manages remediation for hosted environments, but customers managing their own deployments must apply the upgrade.
CVE-2026-103505: CWE-88 Improper neutralization of argument delimiters in a command ('argument injection') in AWS aws-efs-csi-driver
Description
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.
CVSS v3.1
Score 6.5medium
Affected software
AWS
aws-efs-csi-driver
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 identified as CVE-2026-103505 affects the AWS EFS CSI Driver from versions 3.1.0 through 3.4.2. It involves improper neutralization of argument delimiters (CWE-88) in the volume handling component, specifically in the mounttargetipmap volumeAttribute. Remote authenticated users who have permissions to create PersistentVolumes can exploit this to inject arbitrary mount options via comma-separated values, potentially impacting confidentiality and integrity. AWS has published an advisory and recommends upgrading to version 3.5.0 or later to remediate this issue.
Potential Impact
Successful exploitation allows remote authenticated users with PersistentVolume creation permissions to inject arbitrary mount options, which can compromise confidentiality and integrity of the system. The CVSS v3.1 base score is 6.5 (medium severity) with network attack vector, low attack complexity, high privileges required, no user interaction, and impacts on confidentiality and integrity but not availability.
Mitigation Recommendations
A fix is available. Users should upgrade the AWS EFS CSI Driver to version 3.5.0 or later as recommended by AWS in their security advisory. Since this is a cloud service component, AWS manages remediation for hosted environments, but customers managing their own deployments must apply the upgrade.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- AMZN
- Date Reserved
- 2026-09-30T17:35:44.736Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Is Cloud Service
- true
- Vendor Advisory Urls
- [{"url":"https://aws.amazon.com/security/security-bulletins/2026-120-aws/","vendor":"AWS"}]
Threat ID: 6abe807ca43b0b3b89c29c47
Added to database: 10/01/2026, 15:47:08 UTC
Last enriched: 10/01/2026, 16:01:11 UTC
Last updated: 10/01/2026, 16:31:52 UTC
Views: 6
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.