CVE-2026-103505 PUBLISHED

AWS EFS CSI Driver Mount Option Injection via mounttargetipmap

Assigner: AMZN
Reserved: 30.09.2026 Published: 01.10.2026 Updated: 01.10.2026

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 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
CVSS Score: 6.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	High	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

CVSS Vector: 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
CVSS Score: 6.9

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	High
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	Present	Availability	None	Availability	None
Privileges Required	High
User Interaction	None

CVSS 4.0

Product Status

Vendor	AWS
Product	aws-efs-csi-driver
Versions	Default: unaffected affected from 3.1.0 to 3.4.2 (incl.)

References

Problem Types

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

Impacts

CAPEC-6 Argument Injection