CVE-2026-103505CWE-88

CVE-2026-103505

Medium · published October 1, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
36.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
6.9 · 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
EPSS
0.00432 · 36.5th percentile
Weakness
CWE-88 · Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Published
2026-10-01T20:17Z
References (3)
https://aws.amazon.com/security/security-bulletins/2026-120-aws/ · ff89ba41-3aa1-4d27-914a-91399e9639e5https://github.com/kubernetes-sigs/aws-efs-csi-driver/releases/tag/v3.5.0 · ff89ba41-3aa1-4d27-914a-91399e9639e5https://github.com/kubernetes-sigs/aws-efs-csi-driver/security/advisories/GHSA-pv26-6q9q-5773 · ff89ba41-3aa1-4d27-914a-91399e9639e5
EPSS history
Timeline
  • 03 OCT 03:41Z
    EPSS moved — → 0%
    epss
  • 01 OCT 15:36Z
    AWS EFS CSI Driver Mount Option Injection via mounttargetipmap
    cvelistv5