CVE-2026-103505
Description
A flaw was found in the AWS Elastic File System (EFS) Container Storage Interface (CSI) Driver. A remote authenticated user with permissions to create persistent storage volumes can supply crafted comma-separated values within volume configuration attributes. This improper input handling allows the injection of arbitrary mount options, potentially leading to unauthorized access to or modification of underlying file system data.
Statement
Red Hat has reviewed CVE-2026-103505 in the AWS EFS CSI Driver. The vulnerability allows an authenticated user with permission to create PersistentVolumes to inject mount options through the mounttargetipmap volume attribute. Red Hat rates this issue Moderate with a CVSS 3.1 score of 6.5. Red Hat is validating the driver versions shipped in each OpenShift release.
Mitigation
Restrict PersistentVolume creation permissions to trusted users and follow least-privilege RBAC practices. Upgrade the AWS EFS CSI Driver to version 3.5.0 or later when the corresponding Red Hat update is available. Until then, avoid using the affected mounttargetipmap attribute with untrusted input.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.5 | N/A | 6.5 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | High | N/A | High |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | High | N/A | High |
| Integrity Impact | High | N/A | High |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
cve.org: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Understanding the Weakness (CWE)
Confidentiality,Integrity,Availability,Other
Technical Impact: Execute Unauthorized Code or Commands; Alter Execution Logic; Read Application Data; Modify Application Data
An attacker could include arguments that allow unintended commands or code to be executed, allow sensitive data to be read or modified or could cause other unintended behavior.
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