Medium severity · published Oct 1, 2026
CVE-2026-103505
AWS EFS CSI Driver Mount Option Injection via mounttargetipmap
6.5
CVSS
0.4%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AW
aws-efs-csi-driver · AWS
3.1.0 through 3.4.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-103505
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-103505
patch
https://github.com/kubernetes-sigs/aws-efs-csi-driver/releases/tag/v3.5.0
vendor-advisory
https://aws.amazon.com/security/security-bulletins/2026-120-aws/
third-party-advisory
https://github.com/kubernetes-sigs/aws-efs-csi-driver/security/advisories/GHSA-pv26-6q9q-5773
More from aws-efs-csi-driver
8.7
CVE-2026-85781
Unverified access point ownership in Amazon EFS CSI Driver