Vulnerability · Published Apr 17, 2026 · Assigned by AMZN

CVE-2026-6437AWS EFS CSI Driver Mount Option Injection

Medium 6.5

In plain English

A medium-severity argument injection in AWS EFS CSI Driver from Amazon. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.6%top 52.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Improper neutralization of argument delimiters in the volume handling component in AWS EFS CSI Driver (aws-efs-csi-driver) before v3.0.1 allows remote authenticated users with PersistentVolume creation permissions to inject arbitrary mount options via comma injection. To remediate this issue, users should upgrade to version v3.0.1

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/kubernetes-sigs/aws-efs-csi-driver	1.7.8-0.20260416142831-51806c22c575	GHSA-mph4-q2vm-w2pw

Affected products (as reported)

Vendor	Product	Versions
Amazon	AWS EFS CSI Driver	0 – before 3.0.1

Weakness: CWE-88 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

References

https://aws.amazon.com/security/security-bulletins/2026-016-aws/ vendor-advisory
https://github.com/kubernetes-sigs/aws-efs-csi-driver/security/advisories/GHSA-mph4-q2vm-w2pw third-party-advisory
https://github.com/kubernetes-sigs/aws-efs-csi-driver/releases/tag/v3.0.1 patch