CVE-2026-103505

AWS EFS CSI Driver Mount Option Injection via mounttargetipmap

State: Published
Severity: 6.9 Medium
Published: Oct 1, 2026
Updated: Oct 9, 2026
Reserved: Sep 30, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:N/SC:H/SI:N/SA:N	AMZN
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N	AMZN

Weaknesses

CWE-88 Improper neutralization of argument delimiters in a command ('argument injection')

Affected Products

Product	Versions
aws-efs-csi-driverAWS	3.1.0 through 3.4.2Affected

References

https://github.com/kubernetes-sigs/aws-efs-csi-driver/releases/tag/v3.5.0patch
https://aws.amazon.com/security/security-bulletins/2026-120-aws/vendor-advisory
https://github.com/kubernetes-sigs/aws-efs-csi-driver/security/advisories/GHSA-pv26-6q9q-5773third-party-advisory

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